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tools lib api fs: Add sysfs__read_str function
Adding sysfs__read_str function to ease up reading string files from sysfs. New interface is: int sysfs__read_str(const char *entry, char **buf, size_t *sizep); Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1455465826-8426-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -377,6 +377,19 @@ int sysfs__read_int(const char *entry, int *value)
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return filename__read_int(path, value);
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return filename__read_int(path, value);
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}
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}
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int sysfs__read_str(const char *entry, char **buf, size_t *sizep)
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{
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char path[PATH_MAX];
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const char *sysfs = sysfs__mountpoint();
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if (!sysfs)
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return -1;
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snprintf(path, sizeof(path), "%s/%s", sysfs, entry);
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return filename__read_str(path, buf, sizep);
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}
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int sysctl__read_int(const char *sysctl, int *value)
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int sysctl__read_int(const char *sysctl, int *value)
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{
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{
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char path[PATH_MAX];
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char path[PATH_MAX];
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@ -32,4 +32,5 @@ int filename__read_str(const char *filename, char **buf, size_t *sizep);
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int sysctl__read_int(const char *sysctl, int *value);
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int sysctl__read_int(const char *sysctl, int *value);
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int sysfs__read_int(const char *entry, int *value);
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int sysfs__read_int(const char *entry, int *value);
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int sysfs__read_ull(const char *entry, unsigned long long *value);
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int sysfs__read_ull(const char *entry, unsigned long long *value);
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int sysfs__read_str(const char *entry, char **buf, size_t *sizep);
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#endif /* __API_FS__ */
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#endif /* __API_FS__ */
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