perf tools: Eliminate duplicate code and use PATH_MAX consistently

No need for multiple definitions for STR() and die(), also use SuSv2's
PATH_MAX instead of adding MAX_PATH.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-qpujjkw7u0bf0tr4wt55cr9y@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

6 files changed, 24 insertions, 62 deletions

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 710ae3d0a489..59d43abfbfec 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -46,7 +46,6 @@
 
 #define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
 #define DEFAULT_FUNC_FILTER "!_*"
-#define MAX_PATH_LEN 256
 
 /* Session management structure */
 static struct {
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index 96bee5c46008..dbe2f16b1a1a 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -3,7 +3,6 @@
 #include "parse-options.h"
 #include "evsel.h"
 #include "cgroup.h"
-#include "debugfs.h" /* MAX_PATH, STR() */
 #include "evlist.h"
 
 int nr_cgroups;
@@ -12,7 +11,7 @@ static int
 cgroupfs_find_mountpoint(char *buf, size_t maxlen)
 {
         FILE *fp;
-        char mountpoint[MAX_PATH+1], tokens[MAX_PATH+1], type[MAX_PATH+1];
+        char mountpoint[PATH_MAX + 1], tokens[PATH_MAX + 1], type[PATH_MAX + 1];
         char *token, *saved_ptr = NULL;
         int found = 0;
 
@@ -25,8 +24,8 @@ cgroupfs_find_mountpoint(char *buf, size_t maxlen)
          * and inspect every cgroupfs mount point to find one that has
          * perf_event subsystem
          */
-        while (fscanf(fp, "%*s %"STR(MAX_PATH)"s %"STR(MAX_PATH)"s %"
-                                STR(MAX_PATH)"s %*d %*d\n",
+        while (fscanf(fp, "%*s %"STR(PATH_MAX)"s %"STR(PATH_MAX)"s %"
+                                STR(PATH_MAX)"s %*d %*d\n",
                                 mountpoint, type, tokens) == 3) {
 
                 if (!strcmp(type, "cgroup")) {
@@ -57,15 +56,15 @@ cgroupfs_find_mountpoint(char *buf, size_t maxlen)
 
 static int open_cgroup(char *name)
 {
-        char path[MAX_PATH+1];
-        char mnt[MAX_PATH+1];
+        char path[PATH_MAX + 1];
+        char mnt[PATH_MAX + 1];
         int fd;
 
 
-        if (cgroupfs_find_mountpoint(mnt, MAX_PATH+1))
+        if (cgroupfs_find_mountpoint(mnt, PATH_MAX + 1))
                 return -1;
 
-        snprintf(path, MAX_PATH, "%s/%s", mnt, name);
+        snprintf(path, PATH_MAX, "%s/%s", mnt, name);
 
         fd = open(path, O_RDONLY);
         if (fd == -1)
diff --git a/tools/perf/util/debugfs.c b/tools/perf/util/debugfs.c
index a88fefc0cc0a..680be3460e86 100644
--- a/tools/perf/util/debugfs.c
+++ b/tools/perf/util/debugfs.c
@@ -2,8 +2,10 @@
 #include "debugfs.h"
 #include "cache.h"
 
+#include <sys/mount.h>
+
 static int debugfs_premounted;
-static char debugfs_mountpoint[MAX_PATH+1];
+static char debugfs_mountpoint[PATH_MAX + 1];
 
 static const char *debugfs_known_mountpoints[] = {
         "/sys/kernel/debug/",
@@ -64,9 +66,7 @@ const char *debugfs_find_mountpoint(void)
         if (fp == NULL)
                 die("Can't open /proc/mounts for read");
 
-        while (fscanf(fp, "%*s %"
-                      STR(MAX_PATH)
-                      "s %99s %*s %*d %*d\n",
+        while (fscanf(fp, "%*s %" STR(PATH_MAX) "s %99s %*s %*d %*d\n",
                       debugfs_mountpoint, type) == 2) {
                 if (strcmp(type, "debugfs") == 0)
                         break;
@@ -158,7 +158,7 @@ int debugfs_umount(void)
 
 int debugfs_write(const char *entry, const char *value)
 {
-        char path[MAX_PATH+1];
+        char path[PATH_MAX + 1];
         int ret, count;
         int fd;
 
@@ -203,7 +203,7 @@ int debugfs_write(const char *entry, const char *value)
  */
 int debugfs_read(const char *entry, char *buffer, size_t size)
 {
-        char path[MAX_PATH+1];
+        char path[PATH_MAX + 1];
         int ret;
         int fd;
 
diff --git a/tools/perf/util/debugfs.h b/tools/perf/util/debugfs.h
index 83a02879745f..8cd3fa0af880 100644
--- a/tools/perf/util/debugfs.h
+++ b/tools/perf/util/debugfs.h
@@ -1,25 +1,14 @@
 #ifndef __DEBUGFS_H__
 #define __DEBUGFS_H__
 
-#include <sys/mount.h>
-
-#ifndef MAX_PATH
-# define MAX_PATH 256
-#endif
-
-#ifndef STR
-# define _STR(x) #x
-# define STR(x) _STR(x)
-#endif
-
-extern const char *debugfs_find_mountpoint(void);
-extern int debugfs_valid_mountpoint(const char *debugfs);
-extern int debugfs_valid_entry(const char *path);
-extern char *debugfs_mount(const char *mountpoint);
-extern int debugfs_umount(void);
-extern int debugfs_write(const char *entry, const char *value);
-extern int debugfs_read(const char *entry, char *buffer, size_t size);
-extern void debugfs_force_cleanup(void);
-extern int debugfs_make_path(const char *element, char *buffer, int size);
+const char *debugfs_find_mountpoint(void);
+int debugfs_valid_mountpoint(const char *debugfs);
+int debugfs_valid_entry(const char *path);
+char *debugfs_mount(const char *mountpoint);
+int debugfs_umount(void);
+int debugfs_write(const char *entry, const char *value);
+int debugfs_read(const char *entry, char *buffer, size_t size);
+void debugfs_force_cleanup(void);
+int debugfs_make_path(const char *element, char *buffer, int size);
 
 #endif /* __DEBUGFS_H__ */
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index 1132c8f0ce89..17e94d0c36f9 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -5,7 +5,6 @@
 #include "util.h"
 #include "probe-event.h"
 
-#define MAX_PATH_LEN             256
 #define MAX_PROBE_BUFFER        1024
 #define MAX_PROBES               128
 
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index d2655f08bcc0..ac6830d8292b 100644
--- a/tools/perf/util/trace-event-info.c
+++ b/tools/perf/util/trace-event-info.c
@@ -18,7 +18,8 @@
  *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  */
-#define _GNU_SOURCE
+#include <ctype.h>
+#include "util.h"
 #include <dirent.h>
 #include <mntent.h>
 #include <stdio.h>
@@ -31,7 +32,6 @@
 #include <pthread.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <ctype.h>
 #include <errno.h>
 #include <stdbool.h>
 #include <linux/list.h>
@@ -44,10 +44,6 @@
 
 #define VERSION "0.5"
 
-#define _STR(x) #x
-#define STR(x) _STR(x)
-#define MAX_PATH 256
-
 #define TRACE_CTRL      "tracing_on"
 #define TRACE           "trace"
 #define AVAILABLE       "available_tracers"
@@ -73,26 +69,6 @@ struct events {
 };
 
 
-
-static void die(const char *fmt, ...)
-{
-        va_list ap;
-        int ret = errno;
-
-        if (errno)
-                perror("perf");
-        else
-                ret = -1;
-
-        va_start(ap, fmt);
-        fprintf(stderr, "  ");
-        vfprintf(stderr, fmt, ap);
-        va_end(ap);
-
-        fprintf(stderr, "\n");
-        exit(ret);
-}
-
 void *malloc_or_die(unsigned int size)
 {
         void *data;