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authorDaniel Baumann <daniel.baumann@progress-linux.org>2018-11-07 12:22:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2018-11-07 12:22:44 +0000
commit1e6c93250172946eeb38e94a92a1fd12c9d3011e (patch)
tree8ca5e16dfc7ad6b3bf2738ca0a48408a950f8f7e /src/procfile.c
parentUpdate watch file (diff)
downloadnetdata-1e6c93250172946eeb38e94a92a1fd12c9d3011e.tar.xz
netdata-1e6c93250172946eeb38e94a92a1fd12c9d3011e.zip
Merging upstream version 1.11.0+dfsg.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/procfile.c')
-rw-r--r--src/procfile.c468
1 files changed, 0 insertions, 468 deletions
diff --git a/src/procfile.c b/src/procfile.c
deleted file mode 100644
index 044f975b5..000000000
--- a/src/procfile.c
+++ /dev/null
@@ -1,468 +0,0 @@
-#include "common.h"
-#include "procfile.h"
-
-#define PF_PREFIX "PROCFILE"
-
-#define PFWORDS_INCREASE_STEP 200
-#define PFLINES_INCREASE_STEP 10
-#define PROCFILE_INCREMENT_BUFFER 512
-
-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[0]) return ff->filename;
-
- char buffer[FILENAME_MAX + 1];
- snprintfz(buffer, FILENAME_MAX, "/proc/self/fd/%d", ff->fd);
-
- ssize_t l = readlink(buffer, ff->filename, FILENAME_MAX);
- if(unlikely(l == -1))
- snprintfz(ff->filename, FILENAME_MAX, "unknown filename for fd %d", ff->fd);
- else
- ff->filename[l] = '\0';
-
- // 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 pfwords_add(procfile *ff, char *str) {
- // debug(D_PROCFILE, PF_PREFIX ": adding word No %d: '%s'", fw->len, str);
-
- pfwords *fw = ff->words;
- if(unlikely(fw->len == fw->size)) {
- // debug(D_PROCFILE, PF_PREFIX ": expanding words");
-
- ff->words = fw = reallocz(fw, sizeof(pfwords) + (fw->size + PFWORDS_INCREASE_STEP) * sizeof(char *));
- fw->size += PFWORDS_INCREASE_STEP;
- }
-
- fw->words[fw->len++] = str;
-}
-
-NEVERNULL
-static inline pfwords *pfwords_new(void) {
- // 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 pfwords_reset(pfwords *fw) {
- // debug(D_PROCFILE, PF_PREFIX ": reseting words");
- fw->len = 0;
-}
-
-static inline void pfwords_free(pfwords *fw) {
- // debug(D_PROCFILE, PF_PREFIX ": freeing words");
-
- freez(fw);
-}
-
-
-// ----------------------------------------------------------------------------
-// An array of lines
-
-NEVERNULL
-static inline size_t *pflines_add(procfile *ff) {
- // 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)) {
- // debug(D_PROCFILE, PF_PREFIX ": expanding lines");
-
- ff->lines = fl = reallocz(fl, sizeof(pflines) + (fl->size + PFLINES_INCREASE_STEP) * sizeof(ffline));
- fl->size += PFLINES_INCREASE_STEP;
- }
-
- ffline *ffl = &fl->lines[fl->len++];
- ffl->words = 0;
- ffl->first = ff->words->len;
-
- return &ffl->words;
-}
-
-NEVERNULL
-static inline pflines *pflines_new(void) {
- // 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 pflines_reset(pflines *fl) {
- // debug(D_PROCFILE, PF_PREFIX ": reseting lines");
-
- fl->len = 0;
-}
-
-static inline void pflines_free(pflines *fl) {
- // debug(D_PROCFILE, PF_PREFIX ": freeing lines");
-
- freez(fl);
-}
-
-
-// ----------------------------------------------------------------------------
-// The procfile
-
-void procfile_close(procfile *ff) {
- if(unlikely(!ff)) return;
-
- debug(D_PROCFILE, PF_PREFIX ": Closing file '%s'", procfile_filename(ff));
-
- if(likely(ff->lines)) pflines_free(ff->lines);
- if(likely(ff->words)) pfwords_free(ff->words);
-
- if(likely(ff->fd != -1)) close(ff->fd);
- freez(ff);
-}
-
-NOINLINE
-static void procfile_parser(procfile *ff) {
- // 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 = pflines_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';
- pfwords_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';
- pfwords_add(ff, t);
- (*line_words)++;
- t = ++s;
-
- // debug(D_PROCFILE, PF_PREFIX ": ended line %d with %d words", l, ff->lines->lines[l].words);
-
- line_words = pflines_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';
- pfwords_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';
- pfwords_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';
- pfwords_add(ff, t);
- (*line_words)++;
- // t = ++s;
- }
-}
-
-procfile *procfile_readall(procfile *ff) {
- // 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)) {
- debug(D_PROCFILE, PF_PREFIX ": Expanding data buffer for file '%s'.", procfile_filename(ff));
- ff = reallocz(ff, sizeof(procfile) + ff->size + PROCFILE_INCREMENT_BUFFER);
- ff->size += PROCFILE_INCREMENT_BUFFER;
- }
-
- 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))) error(PF_PREFIX ": Cannot read from file '%s' on fd %d", procfile_filename(ff), ff->fd);
- procfile_close(ff);
- return NULL;
- }
-
- ff->len += r;
- }
-
- // 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))) error(PF_PREFIX ": Cannot rewind on file '%s'.", procfile_filename(ff));
- procfile_close(ff);
- return NULL;
- }
-
- pflines_reset(ff->lines);
- pfwords_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;
- }
-
- // debug(D_PROCFILE, "File '%s' updated.", ff->filename);
- return ff;
-}
-
-NOINLINE
-static void procfile_set_separators(procfile *ff, const char *separators) {
- static PF_CHAR_TYPE def[256];
- static char initilized = 0;
-
- if(unlikely(!initilized)) {
- // this is thread safe
- // if initialized is zero, multiple threads may be executing
- // this code at the same time, setting in def[] the exact same values
- int i = 256;
- while(i--) {
- if(unlikely(i == '\n' || i == '\r'))
- def[i] = PF_CHAR_IS_NEWLINE;
-
- else if(unlikely(isspace(i) || !isprint(i)))
- def[i] = PF_CHAR_IS_SEPARATOR;
-
- else
- def[i] = PF_CHAR_IS_WORD;
- }
-
- initilized = 1;
- }
-
- // copy the default
- PF_CHAR_TYPE *ffs = ff->separators, *ffd = def, *ffe = &def[256];
- while(ffd != ffe)
- *ffs++ = *ffd++;
-
- // set the separators
- if(unlikely(!separators))
- separators = " \t=|";
-
- 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) {
- debug(D_PROCFILE, PF_PREFIX ": Opening file '%s'", filename);
-
- int fd = open(filename, O_RDONLY, 0666);
- if(unlikely(fd == -1)) {
- if(unlikely(!(flags & PROCFILE_FLAG_NO_ERROR_ON_FILE_IO))) error(PF_PREFIX ": Cannot open file '%s'", filename);
- return NULL;
- }
-
- // 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[0] = '\0';
-
- ff->fd = fd;
- ff->size = size;
- ff->len = 0;
- ff->flags = flags;
-
- ff->lines = pflines_new();
- ff->words = pfwords_new();
-
- procfile_set_separators(ff, separators);
-
- 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)) {
- // info("PROCFILE: closing fd %d", ff->fd);
- close(ff->fd);
- }
-
- ff->fd = open(filename, O_RDONLY, 0666);
- if(unlikely(ff->fd == -1)) {
- procfile_close(ff);
- return NULL;
- }
-
- // info("PROCFILE: opened '%s' on fd %d", filename, ff->fd);
-
- //strncpyz(ff->filename, filename, FILENAME_MAX);
- ff->filename[0] = '\0';
- 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;
-
- 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);
-
- 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);
- debug(D_PROCFILE, " [%zu.%zu] '%s'", l, w, s);
- }
- }
-}