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| author | Jo-Philipp Wich <jo@mein.io> | 2018-07-31 20:09:02 +0200 |
|---|---|---|
| committer | Jo-Philipp Wich <jo@mein.io> | 2018-07-31 20:09:02 +0200 |
| commit | 3c30b171707858256306db36627649ddfd03bc43 (patch) | |
| tree | 127fd75be7863802834a2ba01a0fcc22a7a48d48 /iwinfo_wl.c | |
| parent | a51413988caaff7001f47c8a62bff11a72ca48bc (diff) | |
| download | iwinfo-3c30b171707858256306db36627649ddfd03bc43.tar.gz | |
wl: only invoke nvram executable if it exists
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Diffstat (limited to 'iwinfo_wl.c')
| -rw-r--r-- | iwinfo_wl.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/iwinfo_wl.c b/iwinfo_wl.c index c7517ec..80d3d7e 100644 --- a/iwinfo_wl.c +++ b/iwinfo_wl.c @@ -18,6 +18,9 @@ * This code is based on the wlc.c utility published by OpenWrt.org . */ +#include <sys/types.h> +#include <sys/stat.h> + #include "iwinfo.h" #include "api/broadcom.h" @@ -702,15 +705,19 @@ static int wl_get_txpower_offset(const char *ifname, int *buf) { FILE *p; char off[8]; + struct stat s; *buf = 0; - if ((p = popen("/usr/sbin/nvram get opo", "r")) != NULL) + if (!stat("/usr/sbin/nvram", &s) && (s.st_mode & S_IXUSR)) { - if (fread(off, 1, sizeof(off), p)) - *buf = strtoul(off, NULL, 16); + if ((p = popen("/usr/sbin/nvram get opo", "r")) != NULL) + { + if (fread(off, 1, sizeof(off), p)) + *buf = strtoul(off, NULL, 16); - pclose(p); + pclose(p); + } } return 0; |