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-rw-r--r--src/proc_self_mountinfo.c347
1 files changed, 179 insertions, 168 deletions
diff --git a/src/proc_self_mountinfo.c b/src/proc_self_mountinfo.c
index 45630b4c0..51aea7aee 100644
--- a/src/proc_self_mountinfo.c
+++ b/src/proc_self_mountinfo.c
@@ -1,231 +1,242 @@
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
#include "common.h"
-#include "log.h"
-#include "appconfig.h"
-
-#include "proc_self_mountinfo.h"
// find the mount info with the given major:minor
// in the supplied linked list of mountinfo structures
struct mountinfo *mountinfo_find(struct mountinfo *root, unsigned long major, unsigned long minor) {
- struct mountinfo *mi;
+ struct mountinfo *mi;
- for(mi = root; mi ; mi = mi->next)
- if(mi->major == major && mi->minor == minor)
- return mi;
+ for(mi = root; mi ; mi = mi->next)
+ if(mi->major == major && mi->minor == minor)
+ return mi;
- return NULL;
+ return NULL;
}
// find the mount info with the given filesystem and mount_source
// in the supplied linked list of mountinfo structures
struct mountinfo *mountinfo_find_by_filesystem_mount_source(struct mountinfo *root, const char *filesystem, const char *mount_source) {
- struct mountinfo *mi;
- uint32_t filesystem_hash = simple_hash(filesystem), mount_source_hash = simple_hash(mount_source);
-
- for(mi = root; mi ; mi = mi->next)
- if(mi->filesystem
- && mi->mount_source
- && mi->filesystem_hash == filesystem_hash
- && mi->mount_source_hash == mount_source_hash
- && !strcmp(mi->filesystem, filesystem)
- && !strcmp(mi->mount_source, mount_source))
- return mi;
-
- return NULL;
+ struct mountinfo *mi;
+ uint32_t filesystem_hash = simple_hash(filesystem), mount_source_hash = simple_hash(mount_source);
+
+ for(mi = root; mi ; mi = mi->next)
+ if(mi->filesystem
+ && mi->mount_source
+ && mi->filesystem_hash == filesystem_hash
+ && mi->mount_source_hash == mount_source_hash
+ && !strcmp(mi->filesystem, filesystem)
+ && !strcmp(mi->mount_source, mount_source))
+ return mi;
+
+ return NULL;
}
struct mountinfo *mountinfo_find_by_filesystem_super_option(struct mountinfo *root, const char *filesystem, const char *super_options) {
- struct mountinfo *mi;
- uint32_t filesystem_hash = simple_hash(filesystem);
+ struct mountinfo *mi;
+ uint32_t filesystem_hash = simple_hash(filesystem);
- size_t solen = strlen(super_options);
+ size_t solen = strlen(super_options);
- for(mi = root; mi ; mi = mi->next)
- if(mi->filesystem
- && mi->super_options
- && mi->filesystem_hash == filesystem_hash
- && !strcmp(mi->filesystem, filesystem)) {
+ for(mi = root; mi ; mi = mi->next)
+ if(mi->filesystem
+ && mi->super_options
+ && mi->filesystem_hash == filesystem_hash
+ && !strcmp(mi->filesystem, filesystem)) {
- // super_options is a comma separated list
- char *s = mi->super_options, *e;
- while(*s) {
- e = ++s;
- while(*e && *e != ',') e++;
+ // super_options is a comma separated list
+ char *s = mi->super_options, *e;
+ while(*s) {
+ e = s + 1;
+ while(*e && *e != ',') e++;
- size_t len = e - s;
- if(len == solen && !strncmp(s, super_options, len))
- return mi;
+ size_t len = e - s;
+ if(len == solen && !strncmp(s, super_options, len))
+ return mi;
- if(*e == ',') s = ++e;
- else s = e;
- }
- }
+ if(*e == ',') s = ++e;
+ else s = e;
+ }
+ }
- return NULL;
+ return NULL;
}
// free a linked list of mountinfo structures
void mountinfo_free(struct mountinfo *mi) {
- if(unlikely(!mi))
- return;
+ if(unlikely(!mi))
+ return;
- if(likely(mi->next))
- mountinfo_free(mi->next);
+ if(likely(mi->next))
+ mountinfo_free(mi->next);
- if(mi->root) free(mi->root);
- if(mi->mount_point) free(mi->mount_point);
- if(mi->mount_options) free(mi->mount_options);
+ freez(mi->root);
+ freez(mi->mount_point);
+ freez(mi->mount_options);
/*
- if(mi->optional_fields_count) {
- int i;
- for(i = 0; i < mi->optional_fields_count ; i++)
- free(*mi->optional_fields[i]);
- }
- free(mi->optional_fields);
+ if(mi->optional_fields_count) {
+ int i;
+ for(i = 0; i < mi->optional_fields_count ; i++)
+ free(*mi->optional_fields[i]);
+ }
+ free(mi->optional_fields);
*/
- free(mi->filesystem);
- free(mi->mount_source);
- free(mi->super_options);
- free(mi);
+ freez(mi->filesystem);
+ freez(mi->mount_source);
+ freez(mi->super_options);
+ freez(mi);
+}
+
+static char *strdupz_decoding_octal(const char *string) {
+ char *buffer = strdupz(string);
+
+ char *d = buffer;
+ const char *s = string;
+
+ while(*s) {
+ if(unlikely(*s == '\\')) {
+ s++;
+ if(likely(isdigit(*s) && isdigit(s[1]) && isdigit(s[2]))) {
+ char c = *s++ - '0';
+ c <<= 3;
+ c |= *s++ - '0';
+ c <<= 3;
+ c |= *s++ - '0';
+ *d++ = c;
+ }
+ else *d++ = '_';
+ }
+ else *d++ = *s++;
+ }
+ *d = '\0';
+
+ return buffer;
}
// read the whole mountinfo into a linked list
struct mountinfo *mountinfo_read() {
- procfile *ff = NULL;
+ procfile *ff = NULL;
+
+ char filename[FILENAME_MAX + 1];
+ snprintfz(filename, FILENAME_MAX, "%s/proc/self/mountinfo", global_host_prefix);
+ ff = procfile_open(filename, " \t", PROCFILE_FLAG_DEFAULT);
+ if(!ff) {
+ snprintfz(filename, FILENAME_MAX, "%s/proc/1/mountinfo", global_host_prefix);
+ ff = procfile_open(filename, " \t", PROCFILE_FLAG_DEFAULT);
+ if(!ff) return NULL;
+ }
+
+ ff = procfile_readall(ff);
+ if(!ff) return NULL;
- char filename[FILENAME_MAX + 1];
- snprintfz(filename, FILENAME_MAX, "%s/proc/self/mountinfo", global_host_prefix);
- ff = procfile_open(filename, " \t", PROCFILE_FLAG_DEFAULT);
- if(!ff) {
- snprintfz(filename, FILENAME_MAX, "%s/proc/1/mountinfo", global_host_prefix);
- ff = procfile_open(filename, " \t", PROCFILE_FLAG_DEFAULT);
- if(!ff) return NULL;
- }
+ struct mountinfo *root = NULL, *last = NULL, *mi = NULL;
- ff = procfile_readall(ff);
- if(!ff) return NULL;
+ unsigned long l, lines = procfile_lines(ff);
+ for(l = 0; l < lines ;l++) {
+ if(procfile_linewords(ff, l) < 5)
+ continue;
- struct mountinfo *root = NULL, *last = NULL, *mi = NULL;
+ mi = mallocz(sizeof(struct mountinfo));
- unsigned long l, lines = procfile_lines(ff);
- for(l = 0; l < lines ;l++) {
- if(procfile_linewords(ff, l) < 5)
- continue;
+ if(unlikely(!root))
+ root = last = mi;
+ else
+ last->next = mi;
- mi = malloc(sizeof(struct mountinfo));
- if(unlikely(!mi)) fatal("Cannot allocate memory for mountinfo");
+ last = mi;
+ mi->next = NULL;
- if(unlikely(!root))
- root = last = mi;
- else
- last->next = mi;
+ unsigned long w = 0;
+ mi->id = strtoul(procfile_lineword(ff, l, w), NULL, 10); w++;
+ mi->parentid = strtoul(procfile_lineword(ff, l, w), NULL, 10); w++;
- last = mi;
- mi->next = NULL;
+ char *major = procfile_lineword(ff, l, w), *minor; w++;
+ for(minor = major; *minor && *minor != ':' ;minor++) ;
- unsigned long w = 0;
- mi->id = strtoul(procfile_lineword(ff, l, w), NULL, 10); w++;
- mi->parentid = strtoul(procfile_lineword(ff, l, w), NULL, 10); w++;
+ if(!*minor) {
+ error("Cannot parse major:minor on '%s' at line %lu of '%s'", major, l + 1, filename);
+ continue;
+ }
- char *major = procfile_lineword(ff, l, w), *minor; w++;
- for(minor = major; *minor && *minor != ':' ;minor++) ;
- *minor = '\0';
- minor++;
+ *minor = '\0';
+ minor++;
- mi->major = strtoul(major, NULL, 10);
- mi->minor = strtoul(minor, NULL, 10);
+ mi->major = strtoul(major, NULL, 10);
+ mi->minor = strtoul(minor, NULL, 10);
- mi->root = strdup(procfile_lineword(ff, l, w)); w++;
- if(unlikely(!mi->root)) fatal("Cannot allocate memory");
- mi->root_hash = simple_hash(mi->root);
+ mi->root = strdupz(procfile_lineword(ff, l, w)); w++;
+ mi->root_hash = simple_hash(mi->root);
- mi->mount_point = strdup(procfile_lineword(ff, l, w)); w++;
- if(unlikely(!mi->mount_point)) fatal("Cannot allocate memory");
- mi->mount_point_hash = simple_hash(mi->mount_point);
+ mi->mount_point = strdupz_decoding_octal(procfile_lineword(ff, l, w)); w++;
+ mi->mount_point_hash = simple_hash(mi->mount_point);
- mi->mount_options = strdup(procfile_lineword(ff, l, w)); w++;
- if(unlikely(!mi->mount_options)) fatal("Cannot allocate memory");
+ mi->mount_options = strdupz(procfile_lineword(ff, l, w)); w++;
- // count the optional fields
+ // count the optional fields
/*
- unsigned long wo = w;
+ unsigned long wo = w;
*/
- mi->optional_fields_count = 0;
- char *s = procfile_lineword(ff, l, w);
- while(*s && *s != '-') {
- w++;
- s = procfile_lineword(ff, l, w);
- mi->optional_fields_count++;
- }
+ mi->optional_fields_count = 0;
+ char *s = procfile_lineword(ff, l, w);
+ while(*s && *s != '-') {
+ w++;
+ s = procfile_lineword(ff, l, w);
+ mi->optional_fields_count++;
+ }
/*
- if(unlikely(mi->optional_fields_count)) {
- // we have some optional fields
- // read them into a new array of pointers;
-
- mi->optional_fields = malloc(mi->optional_fields_count * sizeof(char *));
- if(unlikely(!mi->optional_fields))
- fatal("Cannot allocate memory for %d mountinfo optional fields", mi->optional_fields_count);
-
- int i;
- for(i = 0; i < mi->optional_fields_count ; i++) {
- *mi->optional_fields[wo] = strdup(procfile_lineword(ff, l, w));
- if(!mi->optional_fields[wo]) fatal("Cannot allocate memory");
- wo++;
- }
- }
- else
- mi->optional_fields = NULL;
+ if(unlikely(mi->optional_fields_count)) {
+ // we have some optional fields
+ // read them into a new array of pointers;
+
+ mi->optional_fields = malloc(mi->optional_fields_count * sizeof(char *));
+ if(unlikely(!mi->optional_fields))
+ fatal("Cannot allocate memory for %d mountinfo optional fields", mi->optional_fields_count);
+
+ int i;
+ for(i = 0; i < mi->optional_fields_count ; i++) {
+ *mi->optional_fields[wo] = strdup(procfile_lineword(ff, l, w));
+ if(!mi->optional_fields[wo]) fatal("Cannot allocate memory");
+ wo++;
+ }
+ }
+ else
+ mi->optional_fields = NULL;
*/
- if(likely(*s == '-')) {
- w++;
+ if(likely(*s == '-')) {
+ w++;
- mi->filesystem = strdup(procfile_lineword(ff, l, w)); w++;
- if(!mi->filesystem) fatal("Cannot allocate memory");
- mi->filesystem_hash = simple_hash(mi->filesystem);
+ mi->filesystem = strdupz(procfile_lineword(ff, l, w)); w++;
+ mi->filesystem_hash = simple_hash(mi->filesystem);
- mi->mount_source = strdup(procfile_lineword(ff, l, w)); w++;
- if(!mi->mount_source) fatal("Cannot allocate memory");
- mi->mount_source_hash = simple_hash(mi->mount_source);
+ mi->mount_source = strdupz(procfile_lineword(ff, l, w)); w++;
+ mi->mount_source_hash = simple_hash(mi->mount_source);
- mi->super_options = strdup(procfile_lineword(ff, l, w)); w++;
- if(!mi->super_options) fatal("Cannot allocate memory");
- }
- else {
- mi->filesystem = NULL;
- mi->mount_source = NULL;
- mi->super_options = NULL;
- }
+ mi->super_options = strdupz(procfile_lineword(ff, l, w)); w++;
+ }
+ else {
+ mi->filesystem = NULL;
+ mi->mount_source = NULL;
+ mi->super_options = NULL;
+ }
/*
- info("MOUNTINFO: %u %u %u:%u root '%s', mount point '%s', mount options '%s', filesystem '%s', mount source '%s', super options '%s'",
- mi->id,
- mi->parentid,
- mi->major,
- mi->minor,
- mi->root,
- mi->mount_point,
- mi->mount_options,
- mi->filesystem,
- mi->mount_source,
- mi->super_options
- );
+ info("MOUNTINFO: %u %u %u:%u root '%s', mount point '%s', mount options '%s', filesystem '%s', mount source '%s', super options '%s'",
+ mi->id,
+ mi->parentid,
+ mi->major,
+ mi->minor,
+ mi->root,
+ mi->mount_point,
+ mi->mount_options,
+ mi->filesystem,
+ mi->mount_source,
+ mi->super_options
+ );
*/
- }
+ }
- procfile_close(ff);
- return root;
+ procfile_close(ff);
+ return root;
}
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