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proc_parse: don't play with a function exit code

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We should not have a chance to exit with a wrong code on error
paths.

|^^^\
|    \________________
| **                |_\
\_______/^^^^^^^/_____/
       /      /
      /     /
     /____/

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Andrey Vagin
2015-04-21 16:54:37 +03:00
committed by Pavel Emelyanov
parent e448934a19
commit 6b4ecb90db
1 changed files with 18 additions and 30 deletions
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48
proc_parse.c
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@@ -1239,7 +1239,7 @@ static int parse_fdinfo_pid_s(int pid, int fd, int type,
struct bfd f;
char *str;
bool entry_met = false;
int ret = -1;
int ret, exit_code = -1;;
f.fd = open_proc(pid, "fdinfo/%d", fd);
if (f.fd < 0) {
@@ -1401,7 +1401,6 @@ static int parse_fdinfo_pid_s(int pid, int fd, int type,
if (alloc_fhandle(&e->ffy.f_handle)) {
free_fanotify_mark_entry(e);
ret = -1;
goto out;
}
parse_fhandle_encoded(str + hoff, &e->ffy.f_handle);
@@ -1478,7 +1477,6 @@ static int parse_fdinfo_pid_s(int pid, int fd, int type,
if (alloc_fhandle(ify->f_handle)) {
free_inotify_wd_entry(e);
ret = -1;
goto out;
}
@@ -1494,7 +1492,7 @@ static int parse_fdinfo_pid_s(int pid, int fd, int type,
}
}
ret = 0;
exit_code = 0;
if (entry_met)
goto out;
/*
@@ -1506,11 +1504,11 @@ static int parse_fdinfo_pid_s(int pid, int fd, int type,
pr_err("No records of type %d found in fdinfo file\n", type);
parse_err:
ret = -1;
exit_code = -1;
pr_perror("%s: error parsing [%s] for %d", __func__, str, type);
out:
bclose(&f);
return ret;
return exit_code;
}
int parse_fdinfo_pid(int pid, int fd, int type,
@@ -1600,7 +1598,7 @@ int parse_file_locks(void)
struct file_lock *fl;
FILE *fl_locks;
int ret = 0;
int exit_code = -1;
bool is_blocked;
fl_locks = fopen_proc(PROC_GEN, "locks");
@@ -1615,13 +1613,11 @@ int parse_file_locks(void)
fl = alloc_file_lock();
if (!fl) {
pr_perror("Alloc file lock failed!");
ret = -1;
goto err;
}
if (parse_file_lock_buf(buf, fl, is_blocked)) {
xfree(fl);
ret = -1;
goto err;
}
@@ -1633,7 +1629,6 @@ int parse_file_locks(void)
if (fl->fl_kind == FL_UNKNOWN) {
pr_err("Unknown file lock!\n");
ret = -1;
xfree(fl);
goto err;
}
@@ -1662,9 +1657,10 @@ int parse_file_locks(void)
list_add_tail(&fl->list, &file_lock_list);
}
exit_code = 0;
err:
fclose(fl_locks);
return ret;
return exit_code;
}
void free_posix_timers(struct proc_posix_timers_stat *st)
@@ -1894,7 +1890,7 @@ int parse_cgroups(struct list_head *cgroups, unsigned int *n_cgroups)
{
FILE *f;
char buf[1024], name[1024];
int heirarchy, ret = 0;
int heirarchy, exit_code = -1;
struct cg_controller *cur = NULL;
f = fopen_proc(PROC_GEN, "cgroups");
@@ -1904,16 +1900,17 @@ int parse_cgroups(struct list_head *cgroups, unsigned int *n_cgroups)
}
/* throw away the header */
if (!fgets(buf, 1024, f)) {
ret = -1;
if (!fgets(buf, 1024, f))
goto out;
}
while (fgets(buf, 1024, f)) {
char *n;
char found = 0;
sscanf(buf, "%s %d", name, &heirarchy);
if (sscanf(buf, "%s %d", name, &heirarchy) != 2) {
pr_err("Unable to parse: %s\n", buf);
goto out;
}
list_for_each_entry(cur, cgroups, l) {
if (cur->heirarchy == heirarchy) {
void *m;
@@ -1921,22 +1918,14 @@ int parse_cgroups(struct list_head *cgroups, unsigned int *n_cgroups)
found = 1;
cur->n_controllers++;
m = xrealloc(cur->controllers, sizeof(char *) * cur->n_controllers);
if (!m) {
ret = -1;
if (!m)
goto out;
}
cur->controllers = m;
if (!cur->controllers) {
ret = -1;
goto out;
}
n = xstrdup(name);
if (!n) {
ret = -1;
if (!n)
goto out;
}
cur->controllers[cur->n_controllers-1] = n;
break;
@@ -1945,18 +1934,17 @@ int parse_cgroups(struct list_head *cgroups, unsigned int *n_cgroups)
if (!found) {
struct cg_controller *nc = new_controller(name, heirarchy);
if (!nc) {
ret = -1;
if (!nc)
goto out;
}
list_add_tail(&nc->l, &cur->l);
(*n_cgroups)++;
}
}
exit_code = 0;
out:
fclose(f);
return ret;
return exit_code;
}
/*