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-rw-r--r--libnetdata/procfile/procfile.c490
1 files changed, 0 insertions, 490 deletions
diff --git a/libnetdata/procfile/procfile.c b/libnetdata/procfile/procfile.c
deleted file mode 100644
index 0bc731d68..000000000
--- a/libnetdata/procfile/procfile.c
+++ /dev/null
@@ -1,490 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#include "../libnetdata.h"
-
-#define PF_PREFIX "PROCFILE"
-
-#define PFWORDS_INCREASE_STEP 2000
-#define PFLINES_INCREASE_STEP 200
-#define PROCFILE_INCREMENT_BUFFER 4096
-
-int procfile_open_flags = O_RDONLY;
-
-int procfile_adaptive_initial_allocation = 0;
-
-// if adaptive allocation is set, these store the
-// max values we have seen so far
-size_t procfile_max_lines = PFLINES_INCREASE_STEP;
-size_t procfile_max_words = PFWORDS_INCREASE_STEP;
-size_t procfile_max_allocation = PROCFILE_INCREMENT_BUFFER;
-
-
-// ----------------------------------------------------------------------------
-
-char *procfile_filename(procfile *ff) {
- if(ff->filename)
- return ff->filename;
-
- char filename[FILENAME_MAX + 1];
- char buffer[FILENAME_MAX + 1];
- snprintfz(buffer, FILENAME_MAX, "/proc/self/fd/%d", ff->fd);
-
- ssize_t l = readlink(buffer, filename, FILENAME_MAX);
- if(unlikely(l == -1))
- snprintfz(filename, FILENAME_MAX, "unknown filename for fd %d", ff->fd);
- else
- filename[l] = '\0';
-
-
- ff->filename = strdupz(filename);
-
- // on non-linux systems, something like this will be needed
- // fcntl(ff->fd, F_GETPATH, ff->filename)
-
- return ff->filename;
-}
-
-// ----------------------------------------------------------------------------
-// An array of words
-
-static inline void procfile_words_add(procfile *ff, char *str) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": adding word No %d: '%s'", fw->len, str);
-
- pfwords *fw = ff->words;
- if(unlikely(fw->len == fw->size)) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": expanding words");
- size_t minimum = PFWORDS_INCREASE_STEP;
- size_t optimal = fw->size / 2;
- size_t wanted = (optimal > minimum)?optimal:minimum;
-
- ff->words = fw = reallocz(fw, sizeof(pfwords) + (fw->size + wanted) * sizeof(char *));
- fw->size += wanted;
- }
-
- fw->words[fw->len++] = str;
-}
-
-NEVERNULL
-static inline pfwords *procfile_words_create(void) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": initializing words");
-
- size_t size = (procfile_adaptive_initial_allocation) ? procfile_max_words : PFWORDS_INCREASE_STEP;
-
- pfwords *new = mallocz(sizeof(pfwords) + size * sizeof(char *));
- new->len = 0;
- new->size = size;
- return new;
-}
-
-static inline void procfile_words_reset(pfwords *fw) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": resetting words");
- fw->len = 0;
-}
-
-static inline void procfile_words_free(pfwords *fw) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": freeing words");
-
- freez(fw);
-}
-
-
-// ----------------------------------------------------------------------------
-// An array of lines
-
-NEVERNULL
-static inline size_t *procfile_lines_add(procfile *ff) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": adding line %d at word %d", fl->len, first_word);
-
- pflines *fl = ff->lines;
- if(unlikely(fl->len == fl->size)) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": expanding lines");
- size_t minimum = PFLINES_INCREASE_STEP;
- size_t optimal = fl->size / 2;
- size_t wanted = (optimal > minimum)?optimal:minimum;
-
- ff->lines = fl = reallocz(fl, sizeof(pflines) + (fl->size + wanted) * sizeof(ffline));
- fl->size += wanted;
- }
-
- ffline *ffl = &fl->lines[fl->len++];
- ffl->words = 0;
- ffl->first = ff->words->len;
-
- return &ffl->words;
-}
-
-NEVERNULL
-static inline pflines *procfile_lines_create(void) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": initializing lines");
-
- size_t size = (unlikely(procfile_adaptive_initial_allocation)) ? procfile_max_words : PFLINES_INCREASE_STEP;
-
- pflines *new = mallocz(sizeof(pflines) + size * sizeof(ffline));
- new->len = 0;
- new->size = size;
- return new;
-}
-
-static inline void procfile_lines_reset(pflines *fl) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": resetting lines");
-
- fl->len = 0;
-}
-
-static inline void procfile_lines_free(pflines *fl) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": freeing lines");
-
- freez(fl);
-}
-
-
-// ----------------------------------------------------------------------------
-// The procfile
-
-void procfile_close(procfile *ff) {
- if(unlikely(!ff)) return;
-
- netdata_log_debug(D_PROCFILE, PF_PREFIX ": Closing file '%s'", procfile_filename(ff));
-
- freez(ff->filename);
- procfile_lines_free(ff->lines);
- procfile_words_free(ff->words);
-
- if(likely(ff->fd != -1)) close(ff->fd);
- freez(ff);
-}
-
-NOINLINE
-static void procfile_parser(procfile *ff) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": Parsing file '%s'", ff->filename);
-
- char *s = ff->data // our current position
- , *e = &ff->data[ff->len] // the terminating null
- , *t = ff->data; // the first character of a word (or quoted / parenthesized string)
-
- // the look up array to find our type of character
- PF_CHAR_TYPE *separators = ff->separators;
-
- char quote = 0; // the quote character - only when in quoted string
- size_t opened = 0; // counts the number of open parenthesis
-
- size_t *line_words = procfile_lines_add(ff);
-
- while(s < e) {
- PF_CHAR_TYPE ct = separators[(unsigned char)(*s)];
-
- // this is faster than a switch()
- // read more here: http://lazarenko.me/switch/
- if(likely(ct == PF_CHAR_IS_WORD)) {
- s++;
- }
- else if(likely(ct == PF_CHAR_IS_SEPARATOR)) {
- if(!quote && !opened) {
- if (s != t) {
- // separator, but we have word before it
- *s = '\0';
- procfile_words_add(ff, t);
- (*line_words)++;
- t = ++s;
- }
- else {
- // separator at the beginning
- // skip it
- t = ++s;
- }
- }
- else {
- // we are inside a quote or parenthesized string
- s++;
- }
- }
- else if(likely(ct == PF_CHAR_IS_NEWLINE)) {
- // end of line
-
- *s = '\0';
- procfile_words_add(ff, t);
- (*line_words)++;
- t = ++s;
-
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": ended line %d with %d words", l, ff->lines->lines[l].words);
-
- line_words = procfile_lines_add(ff);
- }
- else if(likely(ct == PF_CHAR_IS_QUOTE)) {
- if(unlikely(!quote && s == t)) {
- // quote opened at the beginning
- quote = *s;
- t = ++s;
- }
- else if(unlikely(quote && quote == *s)) {
- // quote closed
- quote = 0;
-
- *s = '\0';
- procfile_words_add(ff, t);
- (*line_words)++;
- t = ++s;
- }
- else
- s++;
- }
- else if(likely(ct == PF_CHAR_IS_OPEN)) {
- if(s == t) {
- opened++;
- t = ++s;
- }
- else if(opened) {
- opened++;
- s++;
- }
- else
- s++;
- }
- else if(likely(ct == PF_CHAR_IS_CLOSE)) {
- if(opened) {
- opened--;
-
- if(!opened) {
- *s = '\0';
- procfile_words_add(ff, t);
- (*line_words)++;
- t = ++s;
- }
- else
- s++;
- }
- else
- s++;
- }
- else
- fatal("Internal Error: procfile_readall() does not handle all the cases.");
- }
-
- if(likely(s > t && t < e)) {
- // the last word
- if(unlikely(ff->len >= ff->size)) {
- // we are going to loose the last byte
- s = &ff->data[ff->size - 1];
- }
-
- *s = '\0';
- procfile_words_add(ff, t);
- (*line_words)++;
- // t = ++s;
- }
-}
-
-procfile *procfile_readall(procfile *ff) {
- // netdata_log_debug(D_PROCFILE, PF_PREFIX ": Reading file '%s'.", ff->filename);
-
- ff->len = 0; // zero the used size
- ssize_t r = 1; // read at least once
- while(r > 0) {
- ssize_t s = ff->len;
- ssize_t x = ff->size - s;
-
- if(unlikely(!x)) {
- size_t minimum = PROCFILE_INCREMENT_BUFFER;
- size_t optimal = ff->size / 2;
- size_t wanted = (optimal > minimum)?optimal:minimum;
-
- netdata_log_debug(D_PROCFILE, PF_PREFIX ": Expanding data buffer for file '%s' by %zu bytes.", procfile_filename(ff), wanted);
- ff = reallocz(ff, sizeof(procfile) + ff->size + wanted);
- ff->size += wanted;
- }
-
- netdata_log_debug(D_PROCFILE, "Reading file '%s', from position %zd with length %zd", procfile_filename(ff), s, (ssize_t)(ff->size - s));
- r = read(ff->fd, &ff->data[s], ff->size - s);
- if(unlikely(r == -1)) {
- if(unlikely(!(ff->flags & PROCFILE_FLAG_NO_ERROR_ON_FILE_IO))) collector_error(PF_PREFIX ": Cannot read from file '%s' on fd %d", procfile_filename(ff), ff->fd);
- else if(unlikely(ff->flags & PROCFILE_FLAG_ERROR_ON_ERROR_LOG))
- netdata_log_error(PF_PREFIX ": Cannot read from file '%s' on fd %d", procfile_filename(ff), ff->fd);
- procfile_close(ff);
- return NULL;
- }
-
- ff->len += r;
- }
-
- // netdata_log_debug(D_PROCFILE, "Rewinding file '%s'", ff->filename);
- if(unlikely(lseek(ff->fd, 0, SEEK_SET) == -1)) {
- if(unlikely(!(ff->flags & PROCFILE_FLAG_NO_ERROR_ON_FILE_IO))) collector_error(PF_PREFIX ": Cannot rewind on file '%s'.", procfile_filename(ff));
- else if(unlikely(ff->flags & PROCFILE_FLAG_ERROR_ON_ERROR_LOG))
- netdata_log_error(PF_PREFIX ": Cannot rewind on file '%s'.", procfile_filename(ff));
- procfile_close(ff);
- return NULL;
- }
-
- procfile_lines_reset(ff->lines);
- procfile_words_reset(ff->words);
- procfile_parser(ff);
-
- if(unlikely(procfile_adaptive_initial_allocation)) {
- if(unlikely(ff->len > procfile_max_allocation)) procfile_max_allocation = ff->len;
- if(unlikely(ff->lines->len > procfile_max_lines)) procfile_max_lines = ff->lines->len;
- if(unlikely(ff->words->len > procfile_max_words)) procfile_max_words = ff->words->len;
- }
-
- // netdata_log_debug(D_PROCFILE, "File '%s' updated.", ff->filename);
- return ff;
-}
-
-static PF_CHAR_TYPE procfile_default_separators[256];
-__attribute__((constructor)) void procfile_initialize_default_separators(void) {
- int i = 256;
- while(i--) {
- if(unlikely(i == '\n' || i == '\r'))
- procfile_default_separators[i] = PF_CHAR_IS_NEWLINE;
-
- else if(unlikely(isspace(i) || !isprint(i)))
- procfile_default_separators[i] = PF_CHAR_IS_SEPARATOR;
-
- else
- procfile_default_separators[i] = PF_CHAR_IS_WORD;
- }
-}
-
-NOINLINE
-static void procfile_set_separators(procfile *ff, const char *separators) {
- // set the separators
- if(unlikely(!separators))
- separators = " \t=|";
-
- // copy the default
- memcpy(ff->separators, procfile_default_separators, 256 * sizeof(PF_CHAR_TYPE));
-
- PF_CHAR_TYPE *ffs = ff->separators;
- const char *s = separators;
- while(*s)
- ffs[(int)*s++] = PF_CHAR_IS_SEPARATOR;
-}
-
-void procfile_set_quotes(procfile *ff, const char *quotes) {
- PF_CHAR_TYPE *ffs = ff->separators;
-
- // remove all quotes
- int i = 256;
- while(i--)
- if(unlikely(ffs[i] == PF_CHAR_IS_QUOTE))
- ffs[i] = PF_CHAR_IS_WORD;
-
- // if nothing given, return
- if(unlikely(!quotes || !*quotes))
- return;
-
- // set the quotes
- const char *s = quotes;
- while(*s)
- ffs[(int)*s++] = PF_CHAR_IS_QUOTE;
-}
-
-void procfile_set_open_close(procfile *ff, const char *open, const char *close) {
- PF_CHAR_TYPE *ffs = ff->separators;
-
- // remove all open/close
- int i = 256;
- while(i--)
- if(unlikely(ffs[i] == PF_CHAR_IS_OPEN || ffs[i] == PF_CHAR_IS_CLOSE))
- ffs[i] = PF_CHAR_IS_WORD;
-
- // if nothing given, return
- if(unlikely(!open || !*open || !close || !*close))
- return;
-
- // set the openings
- const char *s = open;
- while(*s)
- ffs[(int)*s++] = PF_CHAR_IS_OPEN;
-
- // set the closings
- s = close;
- while(*s)
- ffs[(int)*s++] = PF_CHAR_IS_CLOSE;
-}
-
-procfile *procfile_open(const char *filename, const char *separators, uint32_t flags) {
- netdata_log_debug(D_PROCFILE, PF_PREFIX ": Opening file '%s'", filename);
-
- int fd = open(filename, procfile_open_flags, 0666);
- if(unlikely(fd == -1)) {
- if (unlikely(flags & PROCFILE_FLAG_ERROR_ON_ERROR_LOG))
- netdata_log_error(PF_PREFIX ": Cannot open file '%s'", filename);
- else if (unlikely(!(flags & PROCFILE_FLAG_NO_ERROR_ON_FILE_IO))) {
- if (errno == ENOENT)
- collector_info(PF_PREFIX ": Cannot open file '%s'", filename);
- else
- collector_error(PF_PREFIX ": Cannot open file '%s'", filename);
- }
- return NULL;
- }
-
- // netdata_log_info("PROCFILE: opened '%s' on fd %d", filename, fd);
-
- size_t size = (unlikely(procfile_adaptive_initial_allocation)) ? procfile_max_allocation : PROCFILE_INCREMENT_BUFFER;
- procfile *ff = mallocz(sizeof(procfile) + size);
-
- //strncpyz(ff->filename, filename, FILENAME_MAX);
- ff->filename = NULL;
- ff->fd = fd;
- ff->size = size;
- ff->len = 0;
- ff->flags = flags;
-
- ff->lines = procfile_lines_create();
- ff->words = procfile_words_create();
-
- procfile_set_separators(ff, separators);
-
- netdata_log_debug(D_PROCFILE, "File '%s' opened.", filename);
- return ff;
-}
-
-procfile *procfile_reopen(procfile *ff, const char *filename, const char *separators, uint32_t flags) {
- if(unlikely(!ff)) return procfile_open(filename, separators, flags);
-
- if(likely(ff->fd != -1)) {
- // netdata_log_info("PROCFILE: closing fd %d", ff->fd);
- close(ff->fd);
- }
-
- ff->fd = open(filename, procfile_open_flags, 0666);
- if(unlikely(ff->fd == -1)) {
- procfile_close(ff);
- return NULL;
- }
-
- // netdata_log_info("PROCFILE: opened '%s' on fd %d", filename, ff->fd);
-
- //strncpyz(ff->filename, filename, FILENAME_MAX);
- freez(ff->filename);
- ff->filename = NULL;
- ff->flags = flags;
-
- // do not do the separators again if NULL is given
- if(likely(separators)) procfile_set_separators(ff, separators);
-
- return ff;
-}
-
-// ----------------------------------------------------------------------------
-// example parsing of procfile data
-
-void procfile_print(procfile *ff) {
- size_t lines = procfile_lines(ff), l;
- char *s;
- (void)s;
-
- netdata_log_debug(D_PROCFILE, "File '%s' with %zu lines and %zu words", procfile_filename(ff), ff->lines->len, ff->words->len);
-
- for(l = 0; likely(l < lines) ;l++) {
- size_t words = procfile_linewords(ff, l);
-
- netdata_log_debug(D_PROCFILE, " line %zu starts at word %zu and has %zu words", l, ff->lines->lines[l].first, ff->lines->lines[l].words);
-
- size_t w;
- for(w = 0; likely(w < words) ;w++) {
- s = procfile_lineword(ff, l, w);
- netdata_log_debug(D_PROCFILE, " [%zu.%zu] '%s'", l, w, s);
- }
- }
-}
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