diff options
| -rw-r--r-- | components/battery.c | 41 | ||||
| -rw-r--r-- | components/netspeeds.c | 14 | ||||
| -rw-r--r-- | components/wifi.c | 12 | ||||
| -rw-r--r-- | slstatus.c | 6 | ||||
| -rw-r--r-- | util.c | 21 | ||||
| -rw-r--r-- | util.h | 1 |
6 files changed, 72 insertions, 23 deletions
diff --git a/components/battery.c b/components/battery.c index 90e8590..bcd42cd 100644 --- a/components/battery.c +++ b/components/battery.c @@ -14,9 +14,16 @@ int perc; char path[PATH_MAX]; - snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", - bat, "/capacity"); - return (pscanf(path, "%d", &perc) == 1) ? bprintf("%d", perc) : NULL; + if (esnprintf(path, sizeof(path), + "/sys/class/power_supply/%s/capacity", + bat) < 0) { + return NULL; + } + if (pscanf(path, "%d", &perc) != 1) { + return NULL; + } + + return bprintf("%d", perc); } const char * @@ -32,8 +39,11 @@ size_t i; char path[PATH_MAX], state[12]; - snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", - bat, "/status"); + if (esnprintf(path, sizeof(path), + "/sys/class/power_supply/%s/status", + bat) < 0) { + return NULL; + } if (pscanf(path, "%12s", state) != 1) { return NULL; } @@ -53,20 +63,29 @@ float timeleft; char path[PATH_MAX], state[12]; - snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", - bat, "/status"); + if (esnprintf(path, sizeof(path), + "/sys/class/power_supply/%s/status", + bat) < 0) { + return NULL; + } if (pscanf(path, "%12s", state) != 1) { return NULL; } if (!strcmp(state, "Discharging")) { - snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", - bat, "/charge_now"); + if (esnprintf(path, sizeof(path), + "/sys/class/power_supply/%s/charge_now", + bat) < 0) { + return NULL; + } if (pscanf(path, "%d", &charge_now) != 1) { return NULL; } - snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", - bat, "/current_now"); + if (esnprintf(path, sizeof(path), + "/sys/class/power_supply/%s/current_now", + bat) < 0) { + return NULL; + } if (pscanf(path, "%d", ¤t_now) != 1) { return NULL; } diff --git a/components/netspeeds.c b/components/netspeeds.c index b4e6972..6adc3ea 100644 --- a/components/netspeeds.c +++ b/components/netspeeds.c @@ -17,8 +17,11 @@ oldrxbytes = rxbytes; - snprintf(path, sizeof(path), - "/sys/class/net/%s/statistics/rx_bytes", interface); + if (esnprintf(path, sizeof(path), + "/sys/class/net/%s/statistics/rx_bytes", + interface) < 0) { + return NULL; + } if (pscanf(path, "%llu", &rxbytes) != 1) { return NULL; } @@ -37,8 +40,11 @@ oldtxbytes = txbytes; - snprintf(path, sizeof(path), - "/sys/class/net/%s/statistics/tx_bytes", interface); + if (esnprintf(path, sizeof(path), + "/sys/class/net/%s/statistics/tx_bytes", + interface) < 0) { + return NULL; + } if (pscanf(path, "%llu", &txbytes) != 1) { return NULL; } diff --git a/components/wifi.c b/components/wifi.c index 591f6ad..b3e1723 100644 --- a/components/wifi.c +++ b/components/wifi.c @@ -23,8 +23,11 @@ char status[5]; FILE *fp; - snprintf(path, sizeof(path), "%s%s%s", "/sys/class/net/", iface, - "/operstate"); + if (esnprintf(path, sizeof(path), + "/sys/class/net/%s/operstate", + iface) < 0) { + return NULL; + } if (!(fp = fopen(path, "r"))) { warn("fopen '%s':", path); return NULL; @@ -69,7 +72,10 @@ memset(&wreq, 0, sizeof(struct iwreq)); wreq.u.essid.length = IW_ESSID_MAX_SIZE+1; - snprintf(wreq.ifr_name, sizeof(wreq.ifr_name), "%s", iface); + if (esnprintf(wreq.ifr_name, sizeof(wreq.ifr_name), + "%s", iface) < 0) { + return NULL; + } if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { warn("socket 'AF_INET':"); @@ -91,12 +91,8 @@ main(int argc, char *argv[]) if (!(res = args[i].func(args[i].args))) { res = unknown_str; } - if ((ret = snprintf(status + len, sizeof(status) - len, + if ((ret = esnprintf(status + len, sizeof(status) - len, args[i].fmt, res)) < 0) { - warn("snprintf:"); - break; - } else if ((size_t)ret >= sizeof(status) - len) { - warn("snprintf: Output truncated"); break; } len += ret; @@ -48,6 +48,27 @@ die(const char *fmt, ...) exit(1); } +int +esnprintf(char *str, size_t size, const char *fmt, ...) +{ + va_list ap; + int ret; + + va_start(ap, fmt); + ret = vsnprintf(str, size, fmt, ap); + va_end(ap); + + if (ret < 0) { + warn("snprintf:"); + return -1; + } else if ((size_t)ret >= size) { + warn("snprintf: Output truncated"); + return -1; + } + + return ret; +} + const char * bprintf(const char *fmt, ...) { @@ -8,6 +8,7 @@ extern char *argv0; void warn(const char *, ...); void die(const char *, ...); +int esnprintf(char *str, size_t size, const char *fmt, ...); const char *bprintf(const char *fmt, ...); const char *fmt_scaled(size_t); int pscanf(const char *path, const char *fmt, ...); |