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authorLennart Poettering <lennart@poettering.net>2009-08-20 00:20:03 +0200
committerLennart Poettering <lennart@poettering.net>2009-08-20 00:20:03 +0200
commitc5bd72509ecae1c12bb523fa56432fd71428fbf1 (patch)
tree42f32a2c64d667030e5472af13953e7a7b8d5280 /src/pulsecore
parentf4f16ab10d31e61f1ca8867c2dad9874025637f8 (diff)
core: check return value of getgrnam_r() instead of errno
According to POSIX getgrnam_r() returns the error code as return value, and not in errno. Honour that. Pointed out and inspired by a patch from Ted Percival.
Diffstat (limited to 'src/pulsecore')
-rw-r--r--src/pulsecore/core-util.c74
1 files changed, 34 insertions, 40 deletions
diff --git a/src/pulsecore/core-util.c b/src/pulsecore/core-util.c
index 6494244e..ef8c8472 100644
--- a/src/pulsecore/core-util.c
+++ b/src/pulsecore/core-util.c
@@ -975,6 +975,7 @@ static int is_group(gid_t gid, const char *name) {
int r = -1;
#ifdef HAVE_GETGRGID_R
+
#ifdef _SC_GETGR_R_SIZE_MAX
n = sysconf(_SC_GETGR_R_SIZE_MAX);
#else
@@ -985,38 +986,25 @@ static int is_group(gid_t gid, const char *name) {
data = pa_xmalloc((size_t) n);
+ if ((errno = getgrgid_r(gid, &group, data, (size_t) n, &result)) || !result)
+#else
errno = 0;
- if (getgrgid_r(gid, &group, data, (size_t) n, &result) < 0 || !result) {
- pa_log("getgrgid_r(%u): %s", (unsigned) gid, pa_cstrerror(errno));
-
+ if (!(result = getgrgid(gid)))
+#endif
+ {
if (!errno)
errno = ENOENT;
- goto finish;
- }
-
- r = strcmp(name, result->gr_name) == 0;
-
-finish:
- pa_xfree(data);
-#else
- /* XXX Not thread-safe, but needed on OSes (e.g. FreeBSD 4.X) that do not
- * support getgrgid_r. */
-
- errno = 0;
- if (!(result = getgrgid(gid))) {
pa_log("getgrgid(%u): %s", gid, pa_cstrerror(errno));
- if (!errno)
- errno = ENOENT;
-
goto finish;
}
r = strcmp(name, result->gr_name) == 0;
finish:
-#endif
+
+ pa_xfree(data);
return r;
}
@@ -1065,12 +1053,14 @@ finish:
/* Check whether the specifc user id is a member of the specified group */
int pa_uid_in_group(uid_t uid, const char *name) {
- char *g_buf, *p_buf;
+ char *g_buf = NULL, *p_buf = NULL;
long g_n, p_n;
- struct group grbuf, *gr;
+ struct group grbuf, *gr = NULL;
char **i;
int r = -1;
+#ifdef HAVE_GETGRNAM_R
+
#ifdef _SC_GETGR_R_SIZE_MAX
g_n = sysconf(_SC_GETGR_R_SIZE_MAX);
#else
@@ -1081,6 +1071,19 @@ int pa_uid_in_group(uid_t uid, const char *name) {
g_buf = pa_xmalloc((size_t) g_n);
+ if ((errno = getgrnam_r(name, &grbuf, g_buf, (size_t) g_n, &gr)) != 0 || !gr)
+#else
+ errno = 0;
+ if (!(gr = getgrnam(name)))
+#endif
+ {
+ if (!errno)
+ errno = ENOENT;
+ goto finish;
+ }
+
+#ifdef HAVE_GETPWNAM_R
+
#ifdef _SC_GETPW_R_SIZE_MAX
p_n = sysconf(_SC_GETPW_R_SIZE_MAX);
#else
@@ -1090,26 +1093,16 @@ int pa_uid_in_group(uid_t uid, const char *name) {
p_n = 512;
p_buf = pa_xmalloc((size_t) p_n);
-
- errno = 0;
-#ifdef HAVE_GETGRNAM_R
- if (getgrnam_r(name, &grbuf, g_buf, (size_t) g_n, &gr) != 0 || !gr)
-#else
- if (!(gr = getgrnam(name)))
#endif
- {
- if (!errno)
- errno = ENOENT;
- goto finish;
- }
r = 0;
for (i = gr->gr_mem; *i; i++) {
- struct passwd pwbuf, *pw;
+ struct passwd pwbuf, *pw = NULL;
#ifdef HAVE_GETPWNAM_R
- if (getpwnam_r(*i, &pwbuf, p_buf, (size_t) p_n, &pw) != 0 || !pw)
+ if ((errno = getpwnam_r(*i, &pwbuf, p_buf, (size_t) p_n, &pw)) != 0 || !pw)
#else
+ errno = 0;
if (!(pw = getpwnam(*i)))
#endif
continue;
@@ -1130,9 +1123,11 @@ finish:
/* Get the GID of a gfiven group, return (gid_t) -1 on failure. */
gid_t pa_get_gid_of_group(const char *name) {
gid_t ret = (gid_t) -1;
- char *g_buf;
+ char *g_buf = NULL;
long g_n;
- struct group grbuf, *gr;
+ struct group grbuf, *gr = NULL;
+
+#ifdef HAVE_GETGRNAM_R
#ifdef _SC_GETGR_R_SIZE_MAX
g_n = sysconf(_SC_GETGR_R_SIZE_MAX);
@@ -1144,10 +1139,9 @@ gid_t pa_get_gid_of_group(const char *name) {
g_buf = pa_xmalloc((size_t) g_n);
- errno = 0;
-#ifdef HAVE_GETGRNAM_R
- if (getgrnam_r(name, &grbuf, g_buf, (size_t) g_n, &gr) != 0 || !gr)
+ if ((errno = getgrnam_r(name, &grbuf, g_buf, (size_t) g_n, &gr)) != 0 || !gr)
#else
+ errno = 0;
if (!(gr = getgrnam(name)))
#endif
{