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-rw-r--r--libnetdata/libnetdata.c2097
1 files changed, 2097 insertions, 0 deletions
diff --git a/libnetdata/libnetdata.c b/libnetdata/libnetdata.c
new file mode 100644
index 00000000..37319a88
--- /dev/null
+++ b/libnetdata/libnetdata.c
@@ -0,0 +1,2097 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "libnetdata.h"
+
+#ifdef __APPLE__
+#define INHERIT_NONE 0
+#endif /* __APPLE__ */
+#if defined(__FreeBSD__) || defined(__APPLE__)
+# define O_NOATIME 0
+# define MADV_DONTFORK INHERIT_NONE
+#endif /* __FreeBSD__ || __APPLE__*/
+
+struct rlimit rlimit_nofile = { .rlim_cur = 1024, .rlim_max = 1024 };
+
+#ifdef MADV_MERGEABLE
+int enable_ksm = 1;
+#else
+int enable_ksm = 0;
+#endif
+
+volatile sig_atomic_t netdata_exit = 0;
+const char *program_version = VERSION;
+
+#define MAX_JUDY_SIZE_TO_ARAL 24
+static bool judy_sizes_config[MAX_JUDY_SIZE_TO_ARAL + 1] = {
+ [3] = true,
+ [4] = true,
+ [5] = true,
+ [6] = true,
+ [7] = true,
+ [8] = true,
+ [10] = true,
+ [11] = true,
+ [15] = true,
+ [23] = true,
+};
+static ARAL *judy_sizes_aral[MAX_JUDY_SIZE_TO_ARAL + 1] = {};
+
+struct aral_statistics judy_sizes_aral_statistics = {};
+
+void aral_judy_init(void) {
+ for(size_t Words = 0; Words <= MAX_JUDY_SIZE_TO_ARAL; Words++)
+ if(judy_sizes_config[Words]) {
+ char buf[30+1];
+ snprintfz(buf, sizeof(buf) - 1, "judy-%zu", Words * sizeof(Word_t));
+ judy_sizes_aral[Words] = aral_create(
+ buf,
+ Words * sizeof(Word_t),
+ 0,
+ 65536,
+ &judy_sizes_aral_statistics,
+ NULL, NULL, false, false);
+ }
+}
+
+size_t judy_aral_overhead(void) {
+ return aral_overhead_from_stats(&judy_sizes_aral_statistics);
+}
+
+size_t judy_aral_structures(void) {
+ return aral_structures_from_stats(&judy_sizes_aral_statistics);
+}
+
+static ARAL *judy_size_aral(Word_t Words) {
+ if(Words <= MAX_JUDY_SIZE_TO_ARAL && judy_sizes_aral[Words])
+ return judy_sizes_aral[Words];
+
+ return NULL;
+}
+
+inline Word_t JudyMalloc(Word_t Words) {
+ Word_t Addr;
+
+ ARAL *ar = judy_size_aral(Words);
+ if(ar)
+ Addr = (Word_t) aral_mallocz(ar);
+ else
+ Addr = (Word_t) mallocz(Words * sizeof(Word_t));
+
+ return(Addr);
+}
+
+inline void JudyFree(void * PWord, Word_t Words) {
+ ARAL *ar = judy_size_aral(Words);
+ if(ar)
+ aral_freez(ar, PWord);
+ else
+ freez(PWord);
+}
+
+Word_t JudyMallocVirtual(Word_t Words) {
+ return JudyMalloc(Words);
+}
+
+void JudyFreeVirtual(void * PWord, Word_t Words) {
+ JudyFree(PWord, Words);
+}
+
+// ----------------------------------------------------------------------------
+// memory allocation functions that handle failures
+
+// although netdata does not use memory allocations too often (netdata tries to
+// maintain its memory footprint stable during runtime, i.e. all buffers are
+// allocated during initialization and are adapted to current use throughout
+// its lifetime), these can be used to override the default system allocation
+// routines.
+
+#ifdef NETDATA_TRACE_ALLOCATIONS
+#warning NETDATA_TRACE_ALLOCATIONS ENABLED
+#include "Judy.h"
+
+#if defined(HAVE_DLSYM) && defined(ENABLE_DLSYM)
+#include <dlfcn.h>
+
+typedef void (*libc_function_t)(void);
+
+static void *malloc_first_run(size_t size);
+static void *(*libc_malloc)(size_t) = malloc_first_run;
+
+static void *calloc_first_run(size_t n, size_t size);
+static void *(*libc_calloc)(size_t, size_t) = calloc_first_run;
+
+static void *realloc_first_run(void *ptr, size_t size);
+static void *(*libc_realloc)(void *, size_t) = realloc_first_run;
+
+static void free_first_run(void *ptr);
+static void (*libc_free)(void *) = free_first_run;
+
+static char *strdup_first_run(const char *s);
+static char *(*libc_strdup)(const char *) = strdup_first_run;
+
+static size_t malloc_usable_size_first_run(void *ptr);
+#ifdef HAVE_MALLOC_USABLE_SIZE
+static size_t (*libc_malloc_usable_size)(void *) = malloc_usable_size_first_run;
+#else
+static size_t (*libc_malloc_usable_size)(void *) = NULL;
+#endif
+
+static void link_system_library_function(libc_function_t *func_pptr, const char *name, bool required) {
+ *func_pptr = dlsym(RTLD_NEXT, name);
+ if(!*func_pptr && required) {
+ fprintf(stderr, "FATAL: Cannot find system's %s() function.\n", name);
+ abort();
+ }
+}
+
+static void *malloc_first_run(size_t size) {
+ link_system_library_function((libc_function_t *) &libc_malloc, "malloc", true);
+ return libc_malloc(size);
+}
+
+static void *calloc_first_run(size_t n, size_t size) {
+ link_system_library_function((libc_function_t *) &libc_calloc, "calloc", true);
+ return libc_calloc(n, size);
+}
+
+static void *realloc_first_run(void *ptr, size_t size) {
+ link_system_library_function((libc_function_t *) &libc_realloc, "realloc", true);
+ return libc_realloc(ptr, size);
+}
+
+static void free_first_run(void *ptr) {
+ link_system_library_function((libc_function_t *) &libc_free, "free", true);
+ libc_free(ptr);
+}
+
+static char *strdup_first_run(const char *s) {
+ link_system_library_function((libc_function_t *) &libc_strdup, "strdup", true);
+ return libc_strdup(s);
+}
+
+static size_t malloc_usable_size_first_run(void *ptr) {
+ link_system_library_function((libc_function_t *) &libc_malloc_usable_size, "malloc_usable_size", false);
+
+ if(libc_malloc_usable_size)
+ return libc_malloc_usable_size(ptr);
+ else
+ return 0;
+}
+
+void *malloc(size_t size) {
+ return mallocz(size);
+}
+
+void *calloc(size_t n, size_t size) {
+ return callocz(n, size);
+}
+
+void *realloc(void *ptr, size_t size) {
+ return reallocz(ptr, size);
+}
+
+void *reallocarray(void *ptr, size_t n, size_t size) {
+ return reallocz(ptr, n * size);
+}
+
+void free(void *ptr) {
+ freez(ptr);
+}
+
+char *strdup(const char *s) {
+ return strdupz(s);
+}
+
+size_t malloc_usable_size(void *ptr) {
+ return mallocz_usable_size(ptr);
+}
+#else // !HAVE_DLSYM
+
+static void *(*libc_malloc)(size_t) = malloc;
+static void *(*libc_calloc)(size_t, size_t) = calloc;
+static void *(*libc_realloc)(void *, size_t) = realloc;
+static void (*libc_free)(void *) = free;
+
+#ifdef HAVE_MALLOC_USABLE_SIZE
+static size_t (*libc_malloc_usable_size)(void *) = malloc_usable_size;
+#else
+static size_t (*libc_malloc_usable_size)(void *) = NULL;
+#endif
+
+#endif // HAVE_DLSYM
+
+
+void posix_memfree(void *ptr) {
+ libc_free(ptr);
+}
+
+struct malloc_header_signature {
+ uint32_t magic;
+ uint32_t size;
+ struct malloc_trace *trace;
+};
+
+struct malloc_header {
+ struct malloc_header_signature signature;
+ uint8_t padding[(sizeof(struct malloc_header_signature) % MALLOC_ALIGNMENT) ? MALLOC_ALIGNMENT - (sizeof(struct malloc_header_signature) % MALLOC_ALIGNMENT) : 0];
+ uint8_t data[];
+};
+
+static size_t malloc_header_size = sizeof(struct malloc_header);
+
+int malloc_trace_compare(void *A, void *B) {
+ struct malloc_trace *a = A;
+ struct malloc_trace *b = B;
+ return strcmp(a->function, b->function);
+}
+
+static avl_tree_lock malloc_trace_index = {
+ .avl_tree = {
+ .root = NULL,
+ .compar = malloc_trace_compare},
+ .rwlock = AVL_LOCK_INITIALIZER
+};
+
+int malloc_trace_walkthrough(int (*callback)(void *item, void *data), void *data) {
+ return avl_traverse_lock(&malloc_trace_index, callback, data);
+}
+
+NEVERNULL WARNUNUSED
+static struct malloc_trace *malloc_trace_find_or_create(const char *file, const char *function, size_t line) {
+ struct malloc_trace tmp = {
+ .line = line,
+ .function = function,
+ .file = file,
+ };
+
+ struct malloc_trace *t = (struct malloc_trace *)avl_search_lock(&malloc_trace_index, (avl_t *)&tmp);
+ if(!t) {
+ t = libc_calloc(1, sizeof(struct malloc_trace));
+ if(!t) fatal("No memory");
+ t->line = line;
+ t->function = function;
+ t->file = file;
+
+ struct malloc_trace *t2 = (struct malloc_trace *)avl_insert_lock(&malloc_trace_index, (avl_t *)t);
+ if(t2 != t)
+ free(t);
+
+ t = t2;
+ }
+
+ if(!t)
+ fatal("Cannot insert to AVL");
+
+ return t;
+}
+
+void malloc_trace_mmap(size_t size) {
+ struct malloc_trace *p = malloc_trace_find_or_create("unknown", "netdata_mmap", 1);
+ size_t_atomic_count(add, p->mmap_calls, 1);
+ size_t_atomic_count(add, p->allocations, 1);
+ size_t_atomic_bytes(add, p->bytes, size);
+}
+
+void malloc_trace_munmap(size_t size) {
+ struct malloc_trace *p = malloc_trace_find_or_create("unknown", "netdata_mmap", 1);
+ size_t_atomic_count(add, p->munmap_calls, 1);
+ size_t_atomic_count(sub, p->allocations, 1);
+ size_t_atomic_bytes(sub, p->bytes, size);
+}
+
+void *mallocz_int(size_t size, const char *file, const char *function, size_t line) {
+ struct malloc_trace *p = malloc_trace_find_or_create(file, function, line);
+
+ size_t_atomic_count(add, p->malloc_calls, 1);
+ size_t_atomic_count(add, p->allocations, 1);
+ size_t_atomic_bytes(add, p->bytes, size);
+
+ struct malloc_header *t = (struct malloc_header *)libc_malloc(malloc_header_size + size);
+ if (unlikely(!t)) fatal("mallocz() cannot allocate %zu bytes of memory (%zu with header).", size, malloc_header_size + size);
+ t->signature.magic = 0x0BADCAFE;
+ t->signature.trace = p;
+ t->signature.size = size;
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ for(ssize_t i = 0; i < (ssize_t)sizeof(t->padding) ;i++) // signed to avoid compiler warning when zero-padded
+ t->padding[i] = 0xFF;
+#endif
+
+ return (void *)&t->data;
+}
+
+void *callocz_int(size_t nmemb, size_t size, const char *file, const char *function, size_t line) {
+ struct malloc_trace *p = malloc_trace_find_or_create(file, function, line);
+ size = nmemb * size;
+
+ size_t_atomic_count(add, p->calloc_calls, 1);
+ size_t_atomic_count(add, p->allocations, 1);
+ size_t_atomic_bytes(add, p->bytes, size);
+
+ struct malloc_header *t = (struct malloc_header *)libc_calloc(1, malloc_header_size + size);
+ if (unlikely(!t)) fatal("mallocz() cannot allocate %zu bytes of memory (%zu with header).", size, malloc_header_size + size);
+ t->signature.magic = 0x0BADCAFE;
+ t->signature.trace = p;
+ t->signature.size = size;
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ for(ssize_t i = 0; i < (ssize_t)sizeof(t->padding) ;i++) // signed to avoid compiler warning when zero-padded
+ t->padding[i] = 0xFF;
+#endif
+
+ return &t->data;
+}
+
+char *strdupz_int(const char *s, const char *file, const char *function, size_t line) {
+ struct malloc_trace *p = malloc_trace_find_or_create(file, function, line);
+ size_t size = strlen(s) + 1;
+
+ size_t_atomic_count(add, p->strdup_calls, 1);
+ size_t_atomic_count(add, p->allocations, 1);
+ size_t_atomic_bytes(add, p->bytes, size);
+
+ struct malloc_header *t = (struct malloc_header *)libc_malloc(malloc_header_size + size);
+ if (unlikely(!t)) fatal("strdupz() cannot allocate %zu bytes of memory (%zu with header).", size, malloc_header_size + size);
+ t->signature.magic = 0x0BADCAFE;
+ t->signature.trace = p;
+ t->signature.size = size;
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ for(ssize_t i = 0; i < (ssize_t)sizeof(t->padding) ;i++) // signed to avoid compiler warning when zero-padded
+ t->padding[i] = 0xFF;
+#endif
+
+ memcpy(&t->data, s, size);
+ return (char *)&t->data;
+}
+
+static struct malloc_header *malloc_get_header(void *ptr, const char *caller, const char *file, const char *function, size_t line) {
+ uint8_t *ret = (uint8_t *)ptr - malloc_header_size;
+ struct malloc_header *t = (struct malloc_header *)ret;
+
+ if(t->signature.magic != 0x0BADCAFE) {
+ netdata_log_error("pointer %p is not our pointer (called %s() from %zu@%s, %s()).", ptr, caller, line, file, function);
+ return NULL;
+ }
+
+ return t;
+}
+
+void *reallocz_int(void *ptr, size_t size, const char *file, const char *function, size_t line) {
+ if(!ptr) return mallocz_int(size, file, function, line);
+
+ struct malloc_header *t = malloc_get_header(ptr, __FUNCTION__, file, function, line);
+ if(!t)
+ return libc_realloc(ptr, size);
+
+ if(t->signature.size == size) return ptr;
+ size_t_atomic_count(add, t->signature.trace->free_calls, 1);
+ size_t_atomic_count(sub, t->signature.trace->allocations, 1);
+ size_t_atomic_bytes(sub, t->signature.trace->bytes, t->signature.size);
+
+ struct malloc_trace *p = malloc_trace_find_or_create(file, function, line);
+ size_t_atomic_count(add, p->realloc_calls, 1);
+ size_t_atomic_count(add, p->allocations, 1);
+ size_t_atomic_bytes(add, p->bytes, size);
+
+ t = (struct malloc_header *)libc_realloc(t, malloc_header_size + size);
+ if (unlikely(!t)) fatal("reallocz() cannot allocate %zu bytes of memory (%zu with header).", size, malloc_header_size + size);
+ t->signature.magic = 0x0BADCAFE;
+ t->signature.trace = p;
+ t->signature.size = size;
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ for(ssize_t i = 0; i < (ssize_t)sizeof(t->padding) ;i++) // signed to avoid compiler warning when zero-padded
+ t->padding[i] = 0xFF;
+#endif
+
+ return (void *)&t->data;
+}
+
+size_t mallocz_usable_size_int(void *ptr, const char *file, const char *function, size_t line) {
+ if(unlikely(!ptr)) return 0;
+
+ struct malloc_header *t = malloc_get_header(ptr, __FUNCTION__, file, function, line);
+ if(!t) {
+ if(libc_malloc_usable_size)
+ return libc_malloc_usable_size(ptr);
+ else
+ return 0;
+ }
+
+ return t->signature.size;
+}
+
+void freez_int(void *ptr, const char *file, const char *function, size_t line) {
+ if(unlikely(!ptr)) return;
+
+ struct malloc_header *t = malloc_get_header(ptr, __FUNCTION__, file, function, line);
+ if(!t) {
+ libc_free(ptr);
+ return;
+ }
+
+ size_t_atomic_count(add, t->signature.trace->free_calls, 1);
+ size_t_atomic_count(sub, t->signature.trace->allocations, 1);
+ size_t_atomic_bytes(sub, t->signature.trace->bytes, t->signature.size);
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ // it should crash if it is used after freeing it
+ memset(t, 0, malloc_header_size + t->signature.size);
+#endif
+
+ libc_free(t);
+}
+#else
+
+char *strdupz(const char *s) {
+ char *t = strdup(s);
+ if (unlikely(!t)) fatal("Cannot strdup() string '%s'", s);
+ return t;
+}
+
+// If ptr is NULL, no operation is performed.
+void freez(void *ptr) {
+ free(ptr);
+}
+
+void *mallocz(size_t size) {
+ void *p = malloc(size);
+ if (unlikely(!p)) fatal("Cannot allocate %zu bytes of memory.", size);
+ return p;
+}
+
+void *callocz(size_t nmemb, size_t size) {
+ void *p = calloc(nmemb, size);
+ if (unlikely(!p)) fatal("Cannot allocate %zu bytes of memory.", nmemb * size);
+ return p;
+}
+
+void *reallocz(void *ptr, size_t size) {
+ void *p = realloc(ptr, size);
+ if (unlikely(!p)) fatal("Cannot re-allocate memory to %zu bytes.", size);
+ return p;
+}
+
+void posix_memfree(void *ptr) {
+ free(ptr);
+}
+
+#endif
+
+// --------------------------------------------------------------------------------------------------------------------
+
+void json_escape_string(char *dst, const char *src, size_t size) {
+ const char *t;
+ char *d = dst, *e = &dst[size - 1];
+
+ for(t = src; *t && d < e ;t++) {
+ if(unlikely(*t == '\\' || *t == '"')) {
+ if(unlikely(d + 1 >= e)) break;
+ *d++ = '\\';
+ }
+ *d++ = *t;
+ }
+
+ *d = '\0';
+}
+
+void json_fix_string(char *s) {
+ unsigned char c;
+ while((c = (unsigned char)*s)) {
+ if(unlikely(c == '\\'))
+ *s++ = '/';
+ else if(unlikely(c == '"'))
+ *s++ = '\'';
+ else if(unlikely(isspace(c) || iscntrl(c)))
+ *s++ = ' ';
+ else if(unlikely(!isprint(c) || c > 127))
+ *s++ = '_';
+ else
+ s++;
+ }
+}
+
+unsigned char netdata_map_chart_names[256] = {
+ [0] = '\0', //
+ [1] = '_', //
+ [2] = '_', //
+ [3] = '_', //
+ [4] = '_', //
+ [5] = '_', //
+ [6] = '_', //
+ [7] = '_', //
+ [8] = '_', //
+ [9] = '_', //
+ [10] = '_', //
+ [11] = '_', //
+ [12] = '_', //
+ [13] = '_', //
+ [14] = '_', //
+ [15] = '_', //
+ [16] = '_', //
+ [17] = '_', //
+ [18] = '_', //
+ [19] = '_', //
+ [20] = '_', //
+ [21] = '_', //
+ [22] = '_', //
+ [23] = '_', //
+ [24] = '_', //
+ [25] = '_', //
+ [26] = '_', //
+ [27] = '_', //
+ [28] = '_', //
+ [29] = '_', //
+ [30] = '_', //
+ [31] = '_', //
+ [32] = '_', //
+ [33] = '_', // !
+ [34] = '_', // "
+ [35] = '_', // #
+ [36] = '_', // $
+ [37] = '_', // %
+ [38] = '_', // &
+ [39] = '_', // '
+ [40] = '_', // (
+ [41] = '_', // )
+ [42] = '_', // *
+ [43] = '_', // +
+ [44] = '.', // ,
+ [45] = '-', // -
+ [46] = '.', // .
+ [47] = '/', // /
+ [48] = '0', // 0
+ [49] = '1', // 1
+ [50] = '2', // 2
+ [51] = '3', // 3
+ [52] = '4', // 4
+ [53] = '5', // 5
+ [54] = '6', // 6
+ [55] = '7', // 7
+ [56] = '8', // 8
+ [57] = '9', // 9
+ [58] = '_', // :
+ [59] = '_', // ;
+ [60] = '_', // <
+ [61] = '_', // =
+ [62] = '_', // >
+ [63] = '_', // ?
+ [64] = '_', // @
+ [65] = 'a', // A
+ [66] = 'b', // B
+ [67] = 'c', // C
+ [68] = 'd', // D
+ [69] = 'e', // E
+ [70] = 'f', // F
+ [71] = 'g', // G
+ [72] = 'h', // H
+ [73] = 'i', // I
+ [74] = 'j', // J
+ [75] = 'k', // K
+ [76] = 'l', // L
+ [77] = 'm', // M
+ [78] = 'n', // N
+ [79] = 'o', // O
+ [80] = 'p', // P
+ [81] = 'q', // Q
+ [82] = 'r', // R
+ [83] = 's', // S
+ [84] = 't', // T
+ [85] = 'u', // U
+ [86] = 'v', // V
+ [87] = 'w', // W
+ [88] = 'x', // X
+ [89] = 'y', // Y
+ [90] = 'z', // Z
+ [91] = '_', // [
+ [92] = '/', // backslash
+ [93] = '_', // ]
+ [94] = '_', // ^
+ [95] = '_', // _
+ [96] = '_', // `
+ [97] = 'a', // a
+ [98] = 'b', // b
+ [99] = 'c', // c
+ [100] = 'd', // d
+ [101] = 'e', // e
+ [102] = 'f', // f
+ [103] = 'g', // g
+ [104] = 'h', // h
+ [105] = 'i', // i
+ [106] = 'j', // j
+ [107] = 'k', // k
+ [108] = 'l', // l
+ [109] = 'm', // m
+ [110] = 'n', // n
+ [111] = 'o', // o
+ [112] = 'p', // p
+ [113] = 'q', // q
+ [114] = 'r', // r
+ [115] = 's', // s
+ [116] = 't', // t
+ [117] = 'u', // u
+ [118] = 'v', // v
+ [119] = 'w', // w
+ [120] = 'x', // x
+ [121] = 'y', // y
+ [122] = 'z', // z
+ [123] = '_', // {
+ [124] = '_', // |
+ [125] = '_', // }
+ [126] = '_', // ~
+ [127] = '_', //
+ [128] = '_', //
+ [129] = '_', //
+ [130] = '_', //
+ [131] = '_', //
+ [132] = '_', //
+ [133] = '_', //
+ [134] = '_', //
+ [135] = '_', //
+ [136] = '_', //
+ [137] = '_', //
+ [138] = '_', //
+ [139] = '_', //
+ [140] = '_', //
+ [141] = '_', //
+ [142] = '_', //
+ [143] = '_', //
+ [144] = '_', //
+ [145] = '_', //
+ [146] = '_', //
+ [147] = '_', //
+ [148] = '_', //
+ [149] = '_', //
+ [150] = '_', //
+ [151] = '_', //
+ [152] = '_', //
+ [153] = '_', //
+ [154] = '_', //
+ [155] = '_', //
+ [156] = '_', //
+ [157] = '_', //
+ [158] = '_', //
+ [159] = '_', //
+ [160] = '_', //
+ [161] = '_', //
+ [162] = '_', //
+ [163] = '_', //
+ [164] = '_', //
+ [165] = '_', //
+ [166] = '_', //
+ [167] = '_', //
+ [168] = '_', //
+ [169] = '_', //
+ [170] = '_', //
+ [171] = '_', //
+ [172] = '_', //
+ [173] = '_', //
+ [174] = '_', //
+ [175] = '_', //
+ [176] = '_', //
+ [177] = '_', //
+ [178] = '_', //
+ [179] = '_', //
+ [180] = '_', //
+ [181] = '_', //
+ [182] = '_', //
+ [183] = '_', //
+ [184] = '_', //
+ [185] = '_', //
+ [186] = '_', //
+ [187] = '_', //
+ [188] = '_', //
+ [189] = '_', //
+ [190] = '_', //
+ [191] = '_', //
+ [192] = '_', //
+ [193] = '_', //
+ [194] = '_', //
+ [195] = '_', //
+ [196] = '_', //
+ [197] = '_', //
+ [198] = '_', //
+ [199] = '_', //
+ [200] = '_', //
+ [201] = '_', //
+ [202] = '_', //
+ [203] = '_', //
+ [204] = '_', //
+ [205] = '_', //
+ [206] = '_', //
+ [207] = '_', //
+ [208] = '_', //
+ [209] = '_', //
+ [210] = '_', //
+ [211] = '_', //
+ [212] = '_', //
+ [213] = '_', //
+ [214] = '_', //
+ [215] = '_', //
+ [216] = '_', //
+ [217] = '_', //
+ [218] = '_', //
+ [219] = '_', //
+ [220] = '_', //
+ [221] = '_', //
+ [222] = '_', //
+ [223] = '_', //
+ [224] = '_', //
+ [225] = '_', //
+ [226] = '_', //
+ [227] = '_', //
+ [228] = '_', //
+ [229] = '_', //
+ [230] = '_', //
+ [231] = '_', //
+ [232] = '_', //
+ [233] = '_', //
+ [234] = '_', //
+ [235] = '_', //
+ [236] = '_', //
+ [237] = '_', //
+ [238] = '_', //
+ [239] = '_', //
+ [240] = '_', //
+ [241] = '_', //
+ [242] = '_', //
+ [243] = '_', //
+ [244] = '_', //
+ [245] = '_', //
+ [246] = '_', //
+ [247] = '_', //
+ [248] = '_', //
+ [249] = '_', //
+ [250] = '_', //
+ [251] = '_', //
+ [252] = '_', //
+ [253] = '_', //
+ [254] = '_', //
+ [255] = '_' //
+};
+
+// make sure the supplied string
+// is good for a netdata chart/dimension ID/NAME
+void netdata_fix_chart_name(char *s) {
+ while ((*s = netdata_map_chart_names[(unsigned char) *s])) s++;
+}
+
+unsigned char netdata_map_chart_ids[256] = {
+ [0] = '\0', //
+ [1] = '_', //
+ [2] = '_', //
+ [3] = '_', //
+ [4] = '_', //
+ [5] = '_', //
+ [6] = '_', //
+ [7] = '_', //
+ [8] = '_', //
+ [9] = '_', //
+ [10] = '_', //
+ [11] = '_', //
+ [12] = '_', //
+ [13] = '_', //
+ [14] = '_', //
+ [15] = '_', //
+ [16] = '_', //
+ [17] = '_', //
+ [18] = '_', //
+ [19] = '_', //
+ [20] = '_', //
+ [21] = '_', //
+ [22] = '_', //
+ [23] = '_', //
+ [24] = '_', //
+ [25] = '_', //
+ [26] = '_', //
+ [27] = '_', //
+ [28] = '_', //
+ [29] = '_', //
+ [30] = '_', //
+ [31] = '_', //
+ [32] = '_', //
+ [33] = '_', // !
+ [34] = '_', // "
+ [35] = '_', // #
+ [36] = '_', // $
+ [37] = '_', // %
+ [38] = '_', // &
+ [39] = '_', // '
+ [40] = '_', // (
+ [41] = '_', // )
+ [42] = '_', // *
+ [43] = '_', // +
+ [44] = '.', // ,
+ [45] = '-', // -
+ [46] = '.', // .
+ [47] = '_', // /
+ [48] = '0', // 0
+ [49] = '1', // 1
+ [50] = '2', // 2
+ [51] = '3', // 3
+ [52] = '4', // 4
+ [53] = '5', // 5
+ [54] = '6', // 6
+ [55] = '7', // 7
+ [56] = '8', // 8
+ [57] = '9', // 9
+ [58] = '_', // :
+ [59] = '_', // ;
+ [60] = '_', // <
+ [61] = '_', // =
+ [62] = '_', // >
+ [63] = '_', // ?
+ [64] = '_', // @
+ [65] = 'a', // A
+ [66] = 'b', // B
+ [67] = 'c', // C
+ [68] = 'd', // D
+ [69] = 'e', // E
+ [70] = 'f', // F
+ [71] = 'g', // G
+ [72] = 'h', // H
+ [73] = 'i', // I
+ [74] = 'j', // J
+ [75] = 'k', // K
+ [76] = 'l', // L
+ [77] = 'm', // M
+ [78] = 'n', // N
+ [79] = 'o', // O
+ [80] = 'p', // P
+ [81] = 'q', // Q
+ [82] = 'r', // R
+ [83] = 's', // S
+ [84] = 't', // T
+ [85] = 'u', // U
+ [86] = 'v', // V
+ [87] = 'w', // W
+ [88] = 'x', // X
+ [89] = 'y', // Y
+ [90] = 'z', // Z
+ [91] = '_', // [
+ [92] = '_', // backslash
+ [93] = '_', // ]
+ [94] = '_', // ^
+ [95] = '_', // _
+ [96] = '_', // `
+ [97] = 'a', // a
+ [98] = 'b', // b
+ [99] = 'c', // c
+ [100] = 'd', // d
+ [101] = 'e', // e
+ [102] = 'f', // f
+ [103] = 'g', // g
+ [104] = 'h', // h
+ [105] = 'i', // i
+ [106] = 'j', // j
+ [107] = 'k', // k
+ [108] = 'l', // l
+ [109] = 'm', // m
+ [110] = 'n', // n
+ [111] = 'o', // o
+ [112] = 'p', // p
+ [113] = 'q', // q
+ [114] = 'r', // r
+ [115] = 's', // s
+ [116] = 't', // t
+ [117] = 'u', // u
+ [118] = 'v', // v
+ [119] = 'w', // w
+ [120] = 'x', // x
+ [121] = 'y', // y
+ [122] = 'z', // z
+ [123] = '_', // {
+ [124] = '_', // |
+ [125] = '_', // }
+ [126] = '_', // ~
+ [127] = '_', //
+ [128] = '_', //
+ [129] = '_', //
+ [130] = '_', //
+ [131] = '_', //
+ [132] = '_', //
+ [133] = '_', //
+ [134] = '_', //
+ [135] = '_', //
+ [136] = '_', //
+ [137] = '_', //
+ [138] = '_', //
+ [139] = '_', //
+ [140] = '_', //
+ [141] = '_', //
+ [142] = '_', //
+ [143] = '_', //
+ [144] = '_', //
+ [145] = '_', //
+ [146] = '_', //
+ [147] = '_', //
+ [148] = '_', //
+ [149] = '_', //
+ [150] = '_', //
+ [151] = '_', //
+ [152] = '_', //
+ [153] = '_', //
+ [154] = '_', //
+ [155] = '_', //
+ [156] = '_', //
+ [157] = '_', //
+ [158] = '_', //
+ [159] = '_', //
+ [160] = '_', //
+ [161] = '_', //
+ [162] = '_', //
+ [163] = '_', //
+ [164] = '_', //
+ [165] = '_', //
+ [166] = '_', //
+ [167] = '_', //
+ [168] = '_', //
+ [169] = '_', //
+ [170] = '_', //
+ [171] = '_', //
+ [172] = '_', //
+ [173] = '_', //
+ [174] = '_', //
+ [175] = '_', //
+ [176] = '_', //
+ [177] = '_', //
+ [178] = '_', //
+ [179] = '_', //
+ [180] = '_', //
+ [181] = '_', //
+ [182] = '_', //
+ [183] = '_', //
+ [184] = '_', //
+ [185] = '_', //
+ [186] = '_', //
+ [187] = '_', //
+ [188] = '_', //
+ [189] = '_', //
+ [190] = '_', //
+ [191] = '_', //
+ [192] = '_', //
+ [193] = '_', //
+ [194] = '_', //
+ [195] = '_', //
+ [196] = '_', //
+ [197] = '_', //
+ [198] = '_', //
+ [199] = '_', //
+ [200] = '_', //
+ [201] = '_', //
+ [202] = '_', //
+ [203] = '_', //
+ [204] = '_', //
+ [205] = '_', //
+ [206] = '_', //
+ [207] = '_', //
+ [208] = '_', //
+ [209] = '_', //
+ [210] = '_', //
+ [211] = '_', //
+ [212] = '_', //
+ [213] = '_', //
+ [214] = '_', //
+ [215] = '_', //
+ [216] = '_', //
+ [217] = '_', //
+ [218] = '_', //
+ [219] = '_', //
+ [220] = '_', //
+ [221] = '_', //
+ [222] = '_', //
+ [223] = '_', //
+ [224] = '_', //
+ [225] = '_', //
+ [226] = '_', //
+ [227] = '_', //
+ [228] = '_', //
+ [229] = '_', //
+ [230] = '_', //
+ [231] = '_', //
+ [232] = '_', //
+ [233] = '_', //
+ [234] = '_', //
+ [235] = '_', //
+ [236] = '_', //
+ [237] = '_', //
+ [238] = '_', //
+ [239] = '_', //
+ [240] = '_', //
+ [241] = '_', //
+ [242] = '_', //
+ [243] = '_', //
+ [244] = '_', //
+ [245] = '_', //
+ [246] = '_', //
+ [247] = '_', //
+ [248] = '_', //
+ [249] = '_', //
+ [250] = '_', //
+ [251] = '_', //
+ [252] = '_', //
+ [253] = '_', //
+ [254] = '_', //
+ [255] = '_' //
+};
+
+// make sure the supplied string
+// is good for a netdata chart/dimension ID/NAME
+void netdata_fix_chart_id(char *s) {
+ while ((*s = netdata_map_chart_ids[(unsigned char) *s])) s++;
+}
+
+static int memory_file_open(const char *filename, size_t size) {
+ // netdata_log_info("memory_file_open('%s', %zu", filename, size);
+
+ int fd = open(filename, O_RDWR | O_CREAT | O_NOATIME, 0664);
+ if (fd != -1) {
+ if (lseek(fd, size, SEEK_SET) == (off_t) size) {
+ if (write(fd, "", 1) == 1) {
+ if (ftruncate(fd, size))
+ netdata_log_error("Cannot truncate file '%s' to size %zu. Will use the larger file.", filename, size);
+ }
+ else
+ netdata_log_error("Cannot write to file '%s' at position %zu.", filename, size);
+ }
+ else
+ netdata_log_error("Cannot seek file '%s' to size %zu.", filename, size);
+ }
+ else
+ netdata_log_error("Cannot create/open file '%s'.", filename);
+
+ return fd;
+}
+
+inline int madvise_sequential(void *mem, size_t len) {
+ static int logger = 1;
+ int ret = madvise(mem, len, MADV_SEQUENTIAL);
+
+ if (ret != 0 && logger-- > 0)
+ netdata_log_error("madvise(MADV_SEQUENTIAL) failed.");
+ return ret;
+}
+
+inline int madvise_random(void *mem, size_t len) {
+ static int logger = 1;
+ int ret = madvise(mem, len, MADV_RANDOM);
+
+ if (ret != 0 && logger-- > 0)
+ netdata_log_error("madvise(MADV_RANDOM) failed.");
+ return ret;
+}
+
+inline int madvise_dontfork(void *mem, size_t len) {
+ static int logger = 1;
+ int ret = madvise(mem, len, MADV_DONTFORK);
+
+ if (ret != 0 && logger-- > 0)
+ netdata_log_error("madvise(MADV_DONTFORK) failed.");
+ return ret;
+}
+
+inline int madvise_willneed(void *mem, size_t len) {
+ static int logger = 1;
+ int ret = madvise(mem, len, MADV_WILLNEED);
+
+ if (ret != 0 && logger-- > 0)
+ netdata_log_error("madvise(MADV_WILLNEED) failed.");
+ return ret;
+}
+
+inline int madvise_dontneed(void *mem, size_t len) {
+ static int logger = 1;
+ int ret = madvise(mem, len, MADV_DONTNEED);
+
+ if (ret != 0 && logger-- > 0)
+ netdata_log_error("madvise(MADV_DONTNEED) failed.");
+ return ret;
+}
+
+inline int madvise_dontdump(void *mem __maybe_unused, size_t len __maybe_unused) {
+#if __linux__
+ static int logger = 1;
+ int ret = madvise(mem, len, MADV_DONTDUMP);
+
+ if (ret != 0 && logger-- > 0)
+ netdata_log_error("madvise(MADV_DONTDUMP) failed.");
+ return ret;
+#else
+ return 0;
+#endif
+}
+
+inline int madvise_mergeable(void *mem __maybe_unused, size_t len __maybe_unused) {
+#ifdef MADV_MERGEABLE
+ static int logger = 1;
+ int ret = madvise(mem, len, MADV_MERGEABLE);
+
+ if (ret != 0 && logger-- > 0)
+ netdata_log_error("madvise(MADV_MERGEABLE) failed.");
+ return ret;
+#else
+ return 0;
+#endif
+}
+
+void *netdata_mmap(const char *filename, size_t size, int flags, int ksm, bool read_only, int *open_fd)
+{
+ // netdata_log_info("netdata_mmap('%s', %zu", filename, size);
+
+ // MAP_SHARED is used in memory mode map
+ // MAP_PRIVATE is used in memory mode ram and save
+
+ if(unlikely(!(flags & MAP_SHARED) && !(flags & MAP_PRIVATE)))
+ fatal("Neither MAP_SHARED or MAP_PRIVATE were given to netdata_mmap()");
+
+ if(unlikely((flags & MAP_SHARED) && (flags & MAP_PRIVATE)))
+ fatal("Both MAP_SHARED and MAP_PRIVATE were given to netdata_mmap()");
+
+ if(unlikely((flags & MAP_SHARED) && (!filename || !*filename)))
+ fatal("MAP_SHARED requested, without a filename to netdata_mmap()");
+
+ // don't enable ksm is the global setting is disabled
+ if(unlikely(!enable_ksm)) ksm = 0;
+
+ // KSM only merges anonymous (private) pages, never pagecache (file) pages
+ // but MAP_PRIVATE without MAP_ANONYMOUS it fails too, so we need it always
+ if((flags & MAP_PRIVATE)) flags |= MAP_ANONYMOUS;
+
+ int fd = -1;
+ void *mem = MAP_FAILED;
+
+ if(filename && *filename) {
+ // open/create the file to be used
+ fd = memory_file_open(filename, size);
+ if(fd == -1) goto cleanup;
+ }
+
+ int fd_for_mmap = fd;
+ if(fd != -1 && (flags & MAP_PRIVATE)) {
+ // this is MAP_PRIVATE allocation
+ // no need for mmap() to use our fd
+ // we will copy the file into the memory allocated
+ fd_for_mmap = -1;
+ }
+
+ mem = mmap(NULL, size, read_only ? PROT_READ : PROT_READ | PROT_WRITE, flags, fd_for_mmap, 0);
+ if (mem != MAP_FAILED) {
+
+#ifdef NETDATA_TRACE_ALLOCATIONS
+ malloc_trace_mmap(size);
+#endif
+
+ // if we have a file open, but we didn't give it to mmap(),
+ // we have to read the file into the memory block we allocated
+ if(fd != -1 && fd_for_mmap == -1) {
+ if (lseek(fd, 0, SEEK_SET) == 0) {
+ if (read(fd, mem, size) != (ssize_t) size)
+ netdata_log_info("Cannot read from file '%s'", filename);
+ }
+ else netdata_log_info("Cannot seek to beginning of file '%s'.", filename);
+ }
+
+ // madvise_sequential(mem, size);
+ madvise_dontfork(mem, size);
+ madvise_dontdump(mem, size);
+ // if(flags & MAP_SHARED) madvise_willneed(mem, size);
+ if(ksm) madvise_mergeable(mem, size);
+ }
+
+cleanup:
+ if(fd != -1) {
+ if (open_fd)
+ *open_fd = fd;
+ else
+ close(fd);
+ }
+ if(mem == MAP_FAILED) return NULL;
+ errno = 0;
+ return mem;
+}
+
+int netdata_munmap(void *ptr, size_t size) {
+#ifdef NETDATA_TRACE_ALLOCATIONS
+ malloc_trace_munmap(size);
+#endif
+ return munmap(ptr, size);
+}
+
+int memory_file_save(const char *filename, void *mem, size_t size) {
+ char tmpfilename[FILENAME_MAX + 1];
+
+ snprintfz(tmpfilename, FILENAME_MAX, "%s.%ld.tmp", filename, (long) getpid());
+
+ int fd = open(tmpfilename, O_RDWR | O_CREAT | O_NOATIME, 0664);
+ if (fd < 0) {
+ netdata_log_error("Cannot create/open file '%s'.", filename);
+ return -1;
+ }
+
+ if (write(fd, mem, size) != (ssize_t) size) {
+ netdata_log_error("Cannot write to file '%s' %ld bytes.", filename, (long) size);
+ close(fd);
+ return -1;
+ }
+
+ close(fd);
+
+ if (rename(tmpfilename, filename)) {
+ netdata_log_error("Cannot rename '%s' to '%s'", tmpfilename, filename);
+ return -1;
+ }
+
+ return 0;
+}
+
+int fd_is_valid(int fd) {
+ return fcntl(fd, F_GETFD) != -1 || errno != EBADF;
+}
+
+char *fgets_trim_len(char *buf, size_t buf_size, FILE *fp, size_t *len) {
+ char *s = fgets(buf, (int)buf_size, fp);
+ if (!s) return NULL;
+
+ char *t = s;
+ if (*t != '\0') {
+ // find the string end
+ while (*++t != '\0');
+
+ // trim trailing spaces/newlines/tabs
+ while (--t > s && *t == '\n')
+ *t = '\0';
+ }
+
+ if (len)
+ *len = t - s + 1;
+
+ return s;
+}
+
+// vsnprintfz() returns the number of bytes actually written - after possible truncation
+int vsnprintfz(char *dst, size_t n, const char *fmt, va_list args) {
+ if(unlikely(!n)) return 0;
+
+ int size = vsnprintf(dst, n, fmt, args);
+ dst[n - 1] = '\0';
+
+ if (unlikely((size_t) size >= n)) size = (int)(n - 1);
+
+ return size;
+}
+
+// snprintfz() returns the number of bytes actually written - after possible truncation
+int snprintfz(char *dst, size_t n, const char *fmt, ...) {
+ va_list args;
+
+ va_start(args, fmt);
+ int ret = vsnprintfz(dst, n, fmt, args);
+ va_end(args);
+
+ return ret;
+}
+
+/*
+// poor man cycle counting
+static unsigned long tsc;
+void begin_tsc(void) {
+ unsigned long a, d;
+ asm volatile ("cpuid\nrdtsc" : "=a" (a), "=d" (d) : "0" (0) : "ebx", "ecx");
+ tsc = ((unsigned long)d << 32) | (unsigned long)a;
+}
+unsigned long end_tsc(void) {
+ unsigned long a, d;
+ asm volatile ("rdtscp" : "=a" (a), "=d" (d) : : "ecx");
+ return (((unsigned long)d << 32) | (unsigned long)a) - tsc;
+}
+*/
+
+int recursively_delete_dir(const char *path, const char *reason) {
+ DIR *dir = opendir(path);
+ if(!dir) {
+ netdata_log_error("Cannot read %s directory to be deleted '%s'", reason?reason:"", path);
+ return -1;
+ }
+
+ int ret = 0;
+ struct dirent *de = NULL;
+ while((de = readdir(dir))) {
+ if(de->d_type == DT_DIR
+ && (
+ (de->d_name[0] == '.' && de->d_name[1] == '\0')
+ || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
+ ))
+ continue;
+
+ char fullpath[FILENAME_MAX + 1];
+ snprintfz(fullpath, FILENAME_MAX, "%s/%s", path, de->d_name);
+
+ if(de->d_type == DT_DIR) {
+ int r = recursively_delete_dir(fullpath, reason);
+ if(r > 0) ret += r;
+ continue;
+ }
+
+ netdata_log_info("Deleting %s file '%s'", reason?reason:"", fullpath);
+ if(unlikely(unlink(fullpath) == -1))
+ netdata_log_error("Cannot delete %s file '%s'", reason?reason:"", fullpath);
+ else
+ ret++;
+ }
+
+ netdata_log_info("Deleting empty directory '%s'", path);
+ if(unlikely(rmdir(path) == -1))
+ netdata_log_error("Cannot delete empty directory '%s'", path);
+ else
+ ret++;
+
+ closedir(dir);
+
+ return ret;
+}
+
+static int is_virtual_filesystem(const char *path, char **reason) {
+
+#if defined(__APPLE__) || defined(__FreeBSD__)
+ (void)path;
+ (void)reason;
+#else
+ struct statfs stat;
+ // stat.f_fsid.__val[0] is a file system id
+ // stat.f_fsid.__val[1] is the inode
+ // so their combination uniquely identifies the file/dir
+
+ if (statfs(path, &stat) == -1) {
+ if(reason) *reason = "failed to statfs()";
+ return -1;
+ }
+
+ if(stat.f_fsid.__val[0] != 0 || stat.f_fsid.__val[1] != 0) {
+ errno = EINVAL;
+ if(reason) *reason = "is not a virtual file system";
+ return -1;
+ }
+#endif
+
+ return 0;
+}
+
+int verify_netdata_host_prefix(bool log_msg) {
+ if(!netdata_configured_host_prefix)
+ netdata_configured_host_prefix = "";
+
+ if(!*netdata_configured_host_prefix)
+ return 0;
+
+ char buffer[FILENAME_MAX + 1];
+ char *path = netdata_configured_host_prefix;
+ char *reason = "unknown reason";
+ errno = 0;
+
+ struct stat sb;
+ if (stat(path, &sb) == -1) {
+ reason = "failed to stat()";
+ goto failed;
+ }
+
+ if((sb.st_mode & S_IFMT) != S_IFDIR) {
+ errno = EINVAL;
+ reason = "is not a directory";
+ goto failed;
+ }
+
+ path = buffer;
+ snprintfz(path, FILENAME_MAX, "%s/proc", netdata_configured_host_prefix);
+ if(is_virtual_filesystem(path, &reason) == -1)
+ goto failed;
+
+ snprintfz(path, FILENAME_MAX, "%s/sys", netdata_configured_host_prefix);
+ if(is_virtual_filesystem(path, &reason) == -1)
+ goto failed;
+
+ if (netdata_configured_host_prefix && *netdata_configured_host_prefix) {
+ if (log_msg)
+ netdata_log_info("Using host prefix directory '%s'", netdata_configured_host_prefix);
+ }
+
+ return 0;
+
+failed:
+ if (log_msg)
+ netdata_log_error("Ignoring host prefix '%s': path '%s' %s", netdata_configured_host_prefix, path, reason);
+ netdata_configured_host_prefix = "";
+ return -1;
+}
+
+char *strdupz_path_subpath(const char *path, const char *subpath) {
+ if(unlikely(!path || !*path)) path = ".";
+ if(unlikely(!subpath)) subpath = "";
+
+ // skip trailing slashes in path
+ size_t len = strlen(path);
+ while(len > 0 && path[len - 1] == '/') len--;
+
+ // skip leading slashes in subpath
+ while(subpath[0] == '/') subpath++;
+
+ // if the last character in path is / and (there is a subpath or path is now empty)
+ // keep the trailing slash in path and remove the additional slash
+ char *slash = "/";
+ if(path[len] == '/' && (*subpath || len == 0)) {
+ slash = "";
+ len++;
+ }
+ else if(!*subpath) {
+ // there is no subpath
+ // no need for trailing slash
+ slash = "";
+ }
+
+ char buffer[FILENAME_MAX + 1];
+ snprintfz(buffer, FILENAME_MAX, "%.*s%s%s", (int)len, path, slash, subpath);
+ return strdupz(buffer);
+}
+
+int path_is_dir(const char *path, const char *subpath) {
+ char *s = strdupz_path_subpath(path, subpath);
+
+ size_t max_links = 100;
+
+ int is_dir = 0;
+ struct stat statbuf;
+ while(max_links-- && stat(s, &statbuf) == 0) {
+ if((statbuf.st_mode & S_IFMT) == S_IFDIR) {
+ is_dir = 1;
+ break;
+ }
+ else if((statbuf.st_mode & S_IFMT) == S_IFLNK) {
+ char buffer[FILENAME_MAX + 1];
+ ssize_t l = readlink(s, buffer, FILENAME_MAX);
+ if(l > 0) {
+ buffer[l] = '\0';
+ freez(s);
+ s = strdupz(buffer);
+ continue;
+ }
+ else {
+ is_dir = 0;
+ break;
+ }
+ }
+ else {
+ is_dir = 0;
+ break;
+ }
+ }
+
+ freez(s);
+ return is_dir;
+}
+
+int path_is_file(const char *path, const char *subpath) {
+ char *s = strdupz_path_subpath(path, subpath);
+
+ size_t max_links = 100;
+
+ int is_file = 0;
+ struct stat statbuf;
+ while(max_links-- && stat(s, &statbuf) == 0) {
+ if((statbuf.st_mode & S_IFMT) == S_IFREG) {
+ is_file = 1;
+ break;
+ }
+ else if((statbuf.st_mode & S_IFMT) == S_IFLNK) {
+ char buffer[FILENAME_MAX + 1];
+ ssize_t l = readlink(s, buffer, FILENAME_MAX);
+ if(l > 0) {
+ buffer[l] = '\0';
+ freez(s);
+ s = strdupz(buffer);
+ continue;
+ }
+ else {
+ is_file = 0;
+ break;
+ }
+ }
+ else {
+ is_file = 0;
+ break;
+ }
+ }
+
+ freez(s);
+ return is_file;
+}
+
+void recursive_config_double_dir_load(const char *user_path, const char *stock_path, const char *subpath, int (*callback)(const char *filename, void *data), void *data, size_t depth) {
+ if(depth > 3) {
+ netdata_log_error("CONFIG: Max directory depth reached while reading user path '%s', stock path '%s', subpath '%s'", user_path, stock_path, subpath);
+ return;
+ }
+
+ char *udir = strdupz_path_subpath(user_path, subpath);
+ char *sdir = strdupz_path_subpath(stock_path, subpath);
+
+ netdata_log_debug(D_HEALTH, "CONFIG traversing user-config directory '%s', stock config directory '%s'", udir, sdir);
+
+ DIR *dir = opendir(udir);
+ if (!dir) {
+ netdata_log_error("CONFIG cannot open user-config directory '%s'.", udir);
+ }
+ else {
+ struct dirent *de = NULL;
+ while((de = readdir(dir))) {
+ if(de->d_type == DT_DIR || de->d_type == DT_LNK) {
+ if( !de->d_name[0] ||
+ (de->d_name[0] == '.' && de->d_name[1] == '\0') ||
+ (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
+ ) {
+ netdata_log_debug(D_HEALTH, "CONFIG ignoring user-config directory '%s/%s'", udir, de->d_name);
+ continue;
+ }
+
+ if(path_is_dir(udir, de->d_name)) {
+ recursive_config_double_dir_load(udir, sdir, de->d_name, callback, data, depth + 1);
+ continue;
+ }
+ }
+
+ if(de->d_type == DT_UNKNOWN || de->d_type == DT_REG || de->d_type == DT_LNK) {
+ size_t len = strlen(de->d_name);
+ if(path_is_file(udir, de->d_name) &&
+ len > 5 && !strcmp(&de->d_name[len - 5], ".conf")) {
+ char *filename = strdupz_path_subpath(udir, de->d_name);
+ netdata_log_debug(D_HEALTH, "CONFIG calling callback for user file '%s'", filename);
+ callback(filename, data);
+ freez(filename);
+ continue;
+ }
+ }
+
+ netdata_log_debug(D_HEALTH, "CONFIG ignoring user-config file '%s/%s' of type %d", udir, de->d_name, (int)de->d_type);
+ }
+
+ closedir(dir);
+ }
+
+ netdata_log_debug(D_HEALTH, "CONFIG traversing stock config directory '%s', user config directory '%s'", sdir, udir);
+
+ dir = opendir(sdir);
+ if (!dir) {
+ netdata_log_error("CONFIG cannot open stock config directory '%s'.", sdir);
+ }
+ else {
+ if (strcmp(udir, sdir)) {
+ struct dirent *de = NULL;
+ while((de = readdir(dir))) {
+ if(de->d_type == DT_DIR || de->d_type == DT_LNK) {
+ if( !de->d_name[0] ||
+ (de->d_name[0] == '.' && de->d_name[1] == '\0') ||
+ (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
+ ) {
+ netdata_log_debug(D_HEALTH, "CONFIG ignoring stock config directory '%s/%s'", sdir, de->d_name);
+ continue;
+ }
+
+ if(path_is_dir(sdir, de->d_name)) {
+ // we recurse in stock subdirectory, only when there is no corresponding
+ // user subdirectory - to avoid reading the files twice
+
+ if(!path_is_dir(udir, de->d_name))
+ recursive_config_double_dir_load(udir, sdir, de->d_name, callback, data, depth + 1);
+
+ continue;
+ }
+ }
+
+ if(de->d_type == DT_UNKNOWN || de->d_type == DT_REG || de->d_type == DT_LNK) {
+ size_t len = strlen(de->d_name);
+ if(path_is_file(sdir, de->d_name) && !path_is_file(udir, de->d_name) &&
+ len > 5 && !strcmp(&de->d_name[len - 5], ".conf")) {
+ char *filename = strdupz_path_subpath(sdir, de->d_name);
+ netdata_log_debug(D_HEALTH, "CONFIG calling callback for stock file '%s'", filename);
+ callback(filename, data);
+ freez(filename);
+ continue;
+ }
+
+ }
+
+ netdata_log_debug(D_HEALTH, "CONFIG ignoring stock-config file '%s/%s' of type %d", udir, de->d_name, (int)de->d_type);
+ }
+ }
+ closedir(dir);
+ }
+
+ netdata_log_debug(D_HEALTH, "CONFIG done traversing user-config directory '%s', stock config directory '%s'", udir, sdir);
+
+ freez(udir);
+ freez(sdir);
+}
+
+// Returns the number of bytes read from the file if file_size is not NULL.
+// The actual buffer has an extra byte set to zero (not included in the count).
+char *read_by_filename(const char *filename, long *file_size)
+{
+ FILE *f = fopen(filename, "r");
+ if (!f)
+ return NULL;
+ if (fseek(f, 0, SEEK_END) < 0) {
+ fclose(f);
+ return NULL;
+ }
+ long size = ftell(f);
+ if (size <= 0 || fseek(f, 0, SEEK_END) < 0) {
+ fclose(f);
+ return NULL;
+ }
+ char *contents = callocz(size + 1, 1);
+ if (!contents) {
+ fclose(f);
+ return NULL;
+ }
+ if (fseek(f, 0, SEEK_SET) < 0) {
+ fclose(f);
+ freez(contents);
+ return NULL;
+ }
+ size_t res = fread(contents, 1, size, f);
+ if ( res != (size_t)size) {
+ freez(contents);
+ fclose(f);
+ return NULL;
+ }
+ fclose(f);
+ if (file_size)
+ *file_size = size;
+ return contents;
+}
+
+char *find_and_replace(const char *src, const char *find, const char *replace, const char *where)
+{
+ size_t size = strlen(src) + 1;
+ size_t find_len = strlen(find);
+ size_t repl_len = strlen(replace);
+ char *value, *dst;
+
+ if (likely(where))
+ size += (repl_len - find_len);
+
+ value = mallocz(size);
+ dst = value;
+
+ if (likely(where)) {
+ size_t count = where - src;
+
+ memmove(dst, src, count);
+ src += count;
+ dst += count;
+
+ memmove(dst, replace, repl_len);
+ src += find_len;
+ dst += repl_len;
+ }
+
+ strcpy(dst, src);
+
+ return value;
+}
+
+
+BUFFER *run_command_and_get_output_to_buffer(const char *command, int max_line_length) {
+ BUFFER *wb = buffer_create(0, NULL);
+
+ pid_t pid;
+ FILE *fp = netdata_popen(command, &pid, NULL);
+
+ if(fp) {
+ char buffer[max_line_length + 1];
+ while (fgets(buffer, max_line_length, fp)) {
+ buffer[max_line_length] = '\0';
+ buffer_strcat(wb, buffer);
+ }
+ }
+ else {
+ buffer_free(wb);
+ netdata_log_error("Failed to execute command '%s'.", command);
+ return NULL;
+ }
+
+ netdata_pclose(NULL, fp, pid);
+ return wb;
+}
+
+bool run_command_and_copy_output_to_stdout(const char *command, int max_line_length) {
+ pid_t pid;
+ FILE *fp = netdata_popen(command, &pid, NULL);
+
+ if(fp) {
+ char buffer[max_line_length + 1];
+ while (fgets(buffer, max_line_length, fp))
+ fprintf(stdout, "%s", buffer);
+ }
+ else {
+ netdata_log_error("Failed to execute command '%s'.", command);
+ return false;
+ }
+
+ netdata_pclose(NULL, fp, pid);
+ return true;
+}
+
+void for_each_open_fd(OPEN_FD_ACTION action, OPEN_FD_EXCLUDE excluded_fds){
+ int fd;
+
+ switch(action){
+ case OPEN_FD_ACTION_CLOSE:
+ if(!(excluded_fds & OPEN_FD_EXCLUDE_STDIN)) (void)close(STDIN_FILENO);
+ if(!(excluded_fds & OPEN_FD_EXCLUDE_STDOUT)) (void)close(STDOUT_FILENO);
+ if(!(excluded_fds & OPEN_FD_EXCLUDE_STDERR)) (void)close(STDERR_FILENO);
+#if defined(HAVE_CLOSE_RANGE)
+ if(close_range(STDERR_FILENO + 1, ~0U, 0) == 0) return;
+ netdata_log_error("close_range() failed, will try to close fds one by one");
+#endif
+ break;
+ case OPEN_FD_ACTION_FD_CLOEXEC:
+ if(!(excluded_fds & OPEN_FD_EXCLUDE_STDIN)) (void)fcntl(STDIN_FILENO, F_SETFD, FD_CLOEXEC);
+ if(!(excluded_fds & OPEN_FD_EXCLUDE_STDOUT)) (void)fcntl(STDOUT_FILENO, F_SETFD, FD_CLOEXEC);
+ if(!(excluded_fds & OPEN_FD_EXCLUDE_STDERR)) (void)fcntl(STDERR_FILENO, F_SETFD, FD_CLOEXEC);
+#if defined(HAVE_CLOSE_RANGE) && defined(CLOSE_RANGE_CLOEXEC) // Linux >= 5.11, FreeBSD >= 13.1
+ if(close_range(STDERR_FILENO + 1, ~0U, CLOSE_RANGE_CLOEXEC) == 0) return;
+ netdata_log_error("close_range() failed, will try to mark fds for closing one by one");
+#endif
+ break;
+ default:
+ break; // do nothing
+ }
+
+ DIR *dir = opendir("/proc/self/fd");
+ if (dir == NULL) {
+ struct rlimit rl;
+ int open_max = -1;
+
+ if(getrlimit(RLIMIT_NOFILE, &rl) == 0 && rl.rlim_max != RLIM_INFINITY) open_max = rl.rlim_max;
+#ifdef _SC_OPEN_MAX
+ else open_max = sysconf(_SC_OPEN_MAX);
+#endif
+
+ if (open_max == -1) open_max = 65535; // 65535 arbitrary default if everything else fails
+
+ for (fd = STDERR_FILENO + 1; fd < open_max; fd++) {
+ switch(action){
+ case OPEN_FD_ACTION_CLOSE:
+ if(fd_is_valid(fd)) (void)close(fd);
+ break;
+ case OPEN_FD_ACTION_FD_CLOEXEC:
+ (void)fcntl(fd, F_SETFD, FD_CLOEXEC);
+ break;
+ default:
+ break; // do nothing
+ }
+ }
+ } else {
+ struct dirent *entry;
+ while ((entry = readdir(dir)) != NULL) {
+ fd = str2i(entry->d_name);
+ if(unlikely((fd == STDIN_FILENO ) || (fd == STDOUT_FILENO) || (fd == STDERR_FILENO) )) continue;
+ switch(action){
+ case OPEN_FD_ACTION_CLOSE:
+ if(fd_is_valid(fd)) (void)close(fd);
+ break;
+ case OPEN_FD_ACTION_FD_CLOEXEC:
+ (void)fcntl(fd, F_SETFD, FD_CLOEXEC);
+ break;
+ default:
+ break; // do nothing
+ }
+ }
+ closedir(dir);
+ }
+}
+
+struct timing_steps {
+ const char *name;
+ usec_t time;
+ size_t count;
+} timing_steps[TIMING_STEP_MAX + 1] = {
+ [TIMING_STEP_INTERNAL] = { .name = "internal", .time = 0, },
+
+ [TIMING_STEP_BEGIN2_PREPARE] = { .name = "BEGIN2 prepare", .time = 0, },
+ [TIMING_STEP_BEGIN2_FIND_CHART] = { .name = "BEGIN2 find chart", .time = 0, },
+ [TIMING_STEP_BEGIN2_PARSE] = { .name = "BEGIN2 parse", .time = 0, },
+ [TIMING_STEP_BEGIN2_ML] = { .name = "BEGIN2 ml", .time = 0, },
+ [TIMING_STEP_BEGIN2_PROPAGATE] = { .name = "BEGIN2 propagate", .time = 0, },
+ [TIMING_STEP_BEGIN2_STORE] = { .name = "BEGIN2 store", .time = 0, },
+
+ [TIMING_STEP_SET2_PREPARE] = { .name = "SET2 prepare", .time = 0, },
+ [TIMING_STEP_SET2_LOOKUP_DIMENSION] = { .name = "SET2 find dimension", .time = 0, },
+ [TIMING_STEP_SET2_PARSE] = { .name = "SET2 parse", .time = 0, },
+ [TIMING_STEP_SET2_ML] = { .name = "SET2 ml", .time = 0, },
+ [TIMING_STEP_SET2_PROPAGATE] = { .name = "SET2 propagate", .time = 0, },
+ [TIMING_STEP_RRDSET_STORE_METRIC] = { .name = "SET2 rrdset store", .time = 0, },
+ [TIMING_STEP_DBENGINE_FIRST_CHECK] = { .name = "db 1st check", .time = 0, },
+ [TIMING_STEP_DBENGINE_CHECK_DATA] = { .name = "db check data", .time = 0, },
+ [TIMING_STEP_DBENGINE_PACK] = { .name = "db pack", .time = 0, },
+ [TIMING_STEP_DBENGINE_PAGE_FIN] = { .name = "db page fin", .time = 0, },
+ [TIMING_STEP_DBENGINE_MRG_UPDATE] = { .name = "db mrg update", .time = 0, },
+ [TIMING_STEP_DBENGINE_PAGE_ALLOC] = { .name = "db page alloc", .time = 0, },
+ [TIMING_STEP_DBENGINE_CREATE_NEW_PAGE] = { .name = "db new page", .time = 0, },
+ [TIMING_STEP_DBENGINE_FLUSH_PAGE] = { .name = "db page flush", .time = 0, },
+ [TIMING_STEP_SET2_STORE] = { .name = "SET2 store", .time = 0, },
+
+ [TIMING_STEP_END2_PREPARE] = { .name = "END2 prepare", .time = 0, },
+ [TIMING_STEP_END2_PUSH_V1] = { .name = "END2 push v1", .time = 0, },
+ [TIMING_STEP_END2_ML] = { .name = "END2 ml", .time = 0, },
+ [TIMING_STEP_END2_RRDSET] = { .name = "END2 rrdset", .time = 0, },
+ [TIMING_STEP_END2_PROPAGATE] = { .name = "END2 propagate", .time = 0, },
+ [TIMING_STEP_END2_STORE] = { .name = "END2 store", .time = 0, },
+
+ // terminator
+ [TIMING_STEP_MAX] = { .name = NULL, .time = 0, },
+};
+
+void timing_action(TIMING_ACTION action, TIMING_STEP step) {
+ static __thread usec_t last_action_time = 0;
+ static struct timing_steps timings2[TIMING_STEP_MAX + 1] = {};
+
+ switch(action) {
+ case TIMING_ACTION_INIT:
+ last_action_time = now_monotonic_usec();
+ break;
+
+ case TIMING_ACTION_STEP: {
+ if(!last_action_time)
+ return;
+
+ usec_t now = now_monotonic_usec();
+ __atomic_add_fetch(&timing_steps[step].time, now - last_action_time, __ATOMIC_RELAXED);
+ __atomic_add_fetch(&timing_steps[step].count, 1, __ATOMIC_RELAXED);
+ last_action_time = now;
+ break;
+ }
+
+ case TIMING_ACTION_FINISH: {
+ if(!last_action_time)
+ return;
+
+ usec_t expected = __atomic_load_n(&timing_steps[TIMING_STEP_INTERNAL].time, __ATOMIC_RELAXED);
+ if(last_action_time - expected < 10 * USEC_PER_SEC) {
+ last_action_time = 0;
+ return;
+ }
+
+ if(!__atomic_compare_exchange_n(&timing_steps[TIMING_STEP_INTERNAL].time, &expected, last_action_time, false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)) {
+ last_action_time = 0;
+ return;
+ }
+
+ struct timing_steps timings3[TIMING_STEP_MAX + 1];
+ memcpy(timings3, timing_steps, sizeof(timings3));
+
+ size_t total_reqs = 0;
+ usec_t total_usec = 0;
+ for(size_t t = 1; t < TIMING_STEP_MAX ; t++) {
+ total_usec += timings3[t].time - timings2[t].time;
+ total_reqs += timings3[t].count - timings2[t].count;
+ }
+
+ BUFFER *wb = buffer_create(1024, NULL);
+
+ for(size_t t = 1; t < TIMING_STEP_MAX ; t++) {
+ size_t requests = timings3[t].count - timings2[t].count;
+ if(!requests) continue;
+
+ buffer_sprintf(wb, "TIMINGS REPORT: [%3zu. %-20s]: # %10zu, t %11.2f ms (%6.2f %%), avg %6.2f usec/run\n",
+ t,
+ timing_steps[t].name ? timing_steps[t].name : "x",
+ requests,
+ (double) (timings3[t].time - timings2[t].time) / (double)USEC_PER_MS,
+ (double) (timings3[t].time - timings2[t].time) * 100.0 / (double) total_usec,
+ (double) (timings3[t].time - timings2[t].time) / (double)requests
+ );
+ }
+
+ netdata_log_info("TIMINGS REPORT:\n%sTIMINGS REPORT: total # %10zu, t %11.2f ms",
+ buffer_tostring(wb), total_reqs, (double)total_usec / USEC_PER_MS);
+
+ memcpy(timings2, timings3, sizeof(timings2));
+
+ last_action_time = 0;
+ buffer_free(wb);
+ }
+ }
+}
+
+#ifdef ENABLE_HTTPS
+int hash256_string(const unsigned char *string, size_t size, char *hash) {
+ EVP_MD_CTX *ctx;
+ ctx = EVP_MD_CTX_create();
+
+ if (!ctx)
+ return 0;
+
+ if (!EVP_DigestInit(ctx, EVP_sha256())) {
+ EVP_MD_CTX_destroy(ctx);
+ return 0;
+ }
+
+ if (!EVP_DigestUpdate(ctx, string, size)) {
+ EVP_MD_CTX_destroy(ctx);
+ return 0;
+ }
+
+ if (!EVP_DigestFinal(ctx, (unsigned char *)hash, NULL)) {
+ EVP_MD_CTX_destroy(ctx);
+ return 0;
+ }
+ EVP_MD_CTX_destroy(ctx);
+ return 1;
+}
+#endif
+
+
+bool rrdr_relative_window_to_absolute(time_t *after, time_t *before, time_t now) {
+ if(!now) now = now_realtime_sec();
+
+ int absolute_period_requested = -1;
+ time_t before_requested = *before;
+ time_t after_requested = *after;
+
+ // allow relative for before (smaller than API_RELATIVE_TIME_MAX)
+ if(ABS(before_requested) <= API_RELATIVE_TIME_MAX) {
+ // if the user asked for a positive relative time,
+ // flip it to a negative
+ if(before_requested > 0)
+ before_requested = -before_requested;
+
+ before_requested = now + before_requested;
+ absolute_period_requested = 0;
+ }
+
+ // allow relative for after (smaller than API_RELATIVE_TIME_MAX)
+ if(ABS(after_requested) <= API_RELATIVE_TIME_MAX) {
+ if(after_requested > 0)
+ after_requested = -after_requested;
+
+ // if the user didn't give an after, use the number of points
+ // to give a sane default
+ if(after_requested == 0)
+ after_requested = -600;
+
+ // since the query engine now returns inclusive timestamps
+ // it is awkward to return 6 points when after=-5 is given
+ // so for relative queries we add 1 second, to give
+ // more predictable results to users.
+ after_requested = before_requested + after_requested + 1;
+ absolute_period_requested = 0;
+ }
+
+ if(absolute_period_requested == -1)
+ absolute_period_requested = 1;
+
+ // check if the parameters are flipped
+ if(after_requested > before_requested) {
+ long long t = before_requested;
+ before_requested = after_requested;
+ after_requested = t;
+ }
+
+ // if the query requests future data
+ // shift the query back to be in the present time
+ // (this may also happen because of the rules above)
+ if(before_requested > now) {
+ time_t delta = before_requested - now;
+ before_requested -= delta;
+ after_requested -= delta;
+ }
+
+ *before = before_requested;
+ *after = after_requested;
+
+ return (absolute_period_requested != 1);
+}
+
+// Returns 1 if an absolute period was requested or 0 if it was a relative period
+bool rrdr_relative_window_to_absolute_query(time_t *after, time_t *before, time_t *now_ptr, bool unittest_running) {
+ time_t now = now_realtime_sec() - 1;
+
+ if(now_ptr)
+ *now_ptr = now;
+
+ time_t before_requested = *before;
+ time_t after_requested = *after;
+
+ int absolute_period_requested = rrdr_relative_window_to_absolute(&after_requested, &before_requested, now);
+
+ time_t absolute_minimum_time = now - (10 * 365 * 86400);
+ time_t absolute_maximum_time = now + (1 * 365 * 86400);
+
+ if (after_requested < absolute_minimum_time && !unittest_running)
+ after_requested = absolute_minimum_time;
+
+ if (after_requested > absolute_maximum_time && !unittest_running)
+ after_requested = absolute_maximum_time;
+
+ if (before_requested < absolute_minimum_time && !unittest_running)
+ before_requested = absolute_minimum_time;
+
+ if (before_requested > absolute_maximum_time && !unittest_running)
+ before_requested = absolute_maximum_time;
+
+ *before = before_requested;
+ *after = after_requested;
+
+ return (absolute_period_requested != 1);
+}
+
+int netdata_base64_decode(const char *encoded, char *decoded, size_t decoded_size) {
+ static const unsigned char base64_table[256] = {
+ ['A'] = 0, ['B'] = 1, ['C'] = 2, ['D'] = 3, ['E'] = 4, ['F'] = 5, ['G'] = 6, ['H'] = 7,
+ ['I'] = 8, ['J'] = 9, ['K'] = 10, ['L'] = 11, ['M'] = 12, ['N'] = 13, ['O'] = 14, ['P'] = 15,
+ ['Q'] = 16, ['R'] = 17, ['S'] = 18, ['T'] = 19, ['U'] = 20, ['V'] = 21, ['W'] = 22, ['X'] = 23,
+ ['Y'] = 24, ['Z'] = 25, ['a'] = 26, ['b'] = 27, ['c'] = 28, ['d'] = 29, ['e'] = 30, ['f'] = 31,
+ ['g'] = 32, ['h'] = 33, ['i'] = 34, ['j'] = 35, ['k'] = 36, ['l'] = 37, ['m'] = 38, ['n'] = 39,
+ ['o'] = 40, ['p'] = 41, ['q'] = 42, ['r'] = 43, ['s'] = 44, ['t'] = 45, ['u'] = 46, ['v'] = 47,
+ ['w'] = 48, ['x'] = 49, ['y'] = 50, ['z'] = 51, ['0'] = 52, ['1'] = 53, ['2'] = 54, ['3'] = 55,
+ ['4'] = 56, ['5'] = 57, ['6'] = 58, ['7'] = 59, ['8'] = 60, ['9'] = 61, ['+'] = 62, ['/'] = 63,
+ [0 ... '+' - 1] = 255,
+ ['+' + 1 ... '/' - 1] = 255,
+ ['9' + 1 ... 'A' - 1] = 255,
+ ['Z' + 1 ... 'a' - 1] = 255,
+ ['z' + 1 ... 255] = 255
+ };
+
+ size_t count = 0;
+ unsigned int tmp = 0;
+ int i, bit;
+
+ if (decoded_size < 1)
+ return 0; // Buffer size must be at least 1 for null termination
+
+ for (i = 0, bit = 0; encoded[i]; i++) {
+ unsigned char value = base64_table[(unsigned char)encoded[i]];
+ if (value > 63)
+ return -1; // Invalid character in input
+
+ tmp = tmp << 6 | value;
+ if (++bit == 4) {
+ if (count + 3 >= decoded_size) break; // Stop decoding if buffer is full
+ decoded[count++] = (tmp >> 16) & 0xFF;
+ decoded[count++] = (tmp >> 8) & 0xFF;
+ decoded[count++] = tmp & 0xFF;
+ tmp = 0;
+ bit = 0;
+ }
+ }
+
+ if (bit > 0 && count + 1 < decoded_size) {
+ tmp <<= 6 * (4 - bit);
+ if (bit > 2 && count + 1 < decoded_size) decoded[count++] = (tmp >> 16) & 0xFF;
+ if (bit > 3 && count + 1 < decoded_size) decoded[count++] = (tmp >> 8) & 0xFF;
+ }
+
+ decoded[count] = '\0'; // Null terminate the output string
+ return count;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-14 17:47:46 +0000