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perf tools: Allow overriding sysfs and proc finding with env var
SYSFS_PATH and PROC_PATH environment variables now let the user override the detection of sysfs and proc locations for testing purposes. Signed-off-by: Cody P Schafer <dev@codyps.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1401236684-10579-2-git-send-email-dev@codyps.com Signed-off-by: Jiri Olsa <jolsa@kernel.org>
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1 changed files with 42 additions and 1 deletions
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@ -1,8 +1,10 @@
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/* TODO merge/factor in debugfs.c here */
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/* TODO merge/factor in debugfs.c here */
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#include <ctype.h>
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#include <errno.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string.h>
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#include <sys/vfs.h>
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#include <sys/vfs.h>
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@ -96,12 +98,51 @@ static bool fs__check_mounts(struct fs *fs)
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return false;
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return false;
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}
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}
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static void mem_toupper(char *f, size_t len)
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{
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while (len) {
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*f = toupper(*f);
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f++;
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len--;
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}
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}
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/*
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* Check for "NAME_PATH" environment variable to override fs location (for
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* testing). This matches the recommendation in Documentation/sysfs-rules.txt
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* for SYSFS_PATH.
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*/
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static bool fs__env_override(struct fs *fs)
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{
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char *override_path;
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size_t name_len = strlen(fs->name);
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/* name + "_PATH" + '\0' */
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char upper_name[name_len + 5 + 1];
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memcpy(upper_name, fs->name, name_len);
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mem_toupper(upper_name, name_len);
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strcpy(&upper_name[name_len], "_PATH");
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override_path = getenv(upper_name);
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if (!override_path)
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return false;
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fs->found = true;
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strncpy(fs->path, override_path, sizeof(fs->path));
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return true;
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}
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static const char *fs__get_mountpoint(struct fs *fs)
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static const char *fs__get_mountpoint(struct fs *fs)
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{
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{
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if (fs__env_override(fs))
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return fs->path;
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if (fs__check_mounts(fs))
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if (fs__check_mounts(fs))
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return fs->path;
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return fs->path;
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return fs__read_mounts(fs) ? fs->path : NULL;
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if (fs__read_mounts(fs))
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return fs->path;
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return NULL;
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}
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}
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static const char *fs__mountpoint(int idx)
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static const char *fs__mountpoint(int idx)
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