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used constant string literals && remote initialization to in battery_perc() && trying to fix possible buffer overflow

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This commit is contained in:
Ali H. Fardan 2016-08-28 16:20:50 +03:00
parent 674602c6af
commit 47ddf9382e
2 changed files with 60 additions and 60 deletions
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27
config.def.h
View file

@ -1,18 +1,18 @@
/* See LICENSE file for copyright and license details. */
/* alsa sound */
static const char channel[] = "Master";
#define ALSA_CHANNEL "Master"
/* battery */
static const char batterypath[] = "/sys/class/power_supply/";
static const char batterynow[] = "energy_now";
static const char batteryfull[] = "energy_full_design";
#define BATTERY_PATH "/sys/class/power_supply/"
#define BATTERY_NOW "energy_now"
#define BATTERY_FULL "energy_full_design"
/* bar update interval in seconds (smallest value = 1) */
static unsigned int update_interval = 1;
#define UPDATE_INTERVAL 1;
/* text to show if no value can be retrieved */
static const char unknowntext[] = "n/a";
#define UNKNOWN_STR "n/a"
/* statusbar
- battery_perc (battery percentage) [argument: battery name]
@ -40,13 +40,10 @@ static const char unknowntext[] = "n/a";
- wifi_perc (wifi signal in percent) [argument: wifi card interface name]
- wifi_essid (wifi essid) [argument: wifi card interface name] */
static const struct arg args[] = {
/* function format argument */
{ wifi_perc, "wifi %4s | ", "wlp3s0" },
{ battery_perc, "bat %4s | ", "BAT0" },
{ cpu_perc, "cpu %4s ", NULL },
{ temp, "%3s | ", "/sys/devices/platform/coretemp.0/hwmon/hwmon2/temp1_input" },
{ ram_perc, "ram %3s | ", NULL },
{ vol_perc, "vol %4s | ", "default" },
{ disk_perc, "ssd %3s | ", "/" },
{ datetime, "%s", "%F %T" },
/* function format argument */
{ cpu_perc, "[ CPU %4s ]", NULL },
{ ram_perc, "[ Mem %3s ]", NULL },
{ vol_perc, "[ Volume %4s ]", "default" },
{ disk_perc, "[ HDD %3s ]", "/" },
{ datetime, "[ %s ]", "%F %T" },
};

93
slstatus.c
View file

@ -79,13 +79,16 @@ static char *
smprintf(const char *fmt, ...)
{
va_list fmtargs;
char tmp[120];
char *ret = NULL;
va_start(fmtargs, fmt);
if (vasprintf(&ret, fmt, fmtargs) < 0)
snprintf(tmp, sizeof(tmp)-1, fmt, fmtargs);
tmp[sizeof(tmp)] = '\0';
if (asprintf(&ret, "%s", tmp) < 0)
return NULL;
va_end(fmtargs);
va_end(fmtargs);
return ret;
}
@ -93,23 +96,23 @@ static char *
battery_perc(const char *battery)
{
int now, full, perc;
char batterynowfile[64] = "";
char batteryfullfile[64] = "";
char batterynowfile[64];
char batteryfullfile[64];
FILE *fp;
strlcat(batterynowfile, batterypath, sizeof(batterynowfile));
strlcpy(batterynowfile, BATTERY_PATH, sizeof(batterynowfile));
strlcat(batterynowfile, battery, sizeof(batterynowfile));
strlcat(batterynowfile, "/", sizeof(batterynowfile));
strlcat(batterynowfile, batterynow, sizeof(batterynowfile));
strlcat(batterynowfile, BATTERY_NOW, sizeof(batterynowfile));
strlcat(batteryfullfile, batterypath, sizeof(batteryfullfile));
strlcpy(batteryfullfile, BATTERY_PATH, sizeof(batteryfullfile));
strlcat(batteryfullfile, battery, sizeof(batteryfullfile));
strlcat(batteryfullfile, "/", sizeof(batteryfullfile));
strlcat(batteryfullfile, batteryfull, sizeof(batteryfullfile));
strlcat(batteryfullfile, BATTERY_FULL, sizeof(batteryfullfile));
if (!(fp = fopen(batterynowfile, "r"))) {
fprintf(stderr, "Error opening battery file: %s.\n", batterynowfile);
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%i", &now);
@ -117,7 +120,7 @@ battery_perc(const char *battery)
if (!(fp = fopen(batteryfullfile, "r"))) {
fprintf(stderr, "Error opening battery file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%i", &full);
@ -137,7 +140,7 @@ cpu_perc(void)
if (!(fp = fopen("/proc/stat","r"))) {
fprintf(stderr, "Error opening stat file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
@ -148,7 +151,7 @@ cpu_perc(void)
if (!(fp = fopen("/proc/stat","r"))) {
fprintf(stderr, "Error opening stat file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
@ -165,7 +168,7 @@ datetime(const char *timeformat)
char *buf = malloc(bufsize);
if (buf == NULL) {
fprintf(stderr, "Failed to get date/time.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
time(&tm);
@ -174,7 +177,7 @@ datetime(const char *timeformat)
setlocale(LC_TIME, "C");
free(buf);
fprintf(stderr, "Strftime failed.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
setlocale(LC_TIME, "C");
@ -190,7 +193,7 @@ disk_free(const char *mountpoint)
if (statvfs(mountpoint, &fs) < 0) {
fprintf(stderr, "Could not get filesystem info.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
}
@ -203,7 +206,7 @@ disk_perc(const char *mountpoint)
if (statvfs(mountpoint, &fs) < 0) {
fprintf(stderr, "Could not get filesystem info.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
@ -217,7 +220,7 @@ disk_total(const char *mountpoint)
if (statvfs(mountpoint, &fs) < 0) {
fprintf(stderr, "Could not get filesystem info.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
@ -230,7 +233,7 @@ disk_used(const char *mountpoint)
if (statvfs(mountpoint, &fs) < 0) {
fprintf(stderr, "Could not get filesystem info.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
@ -244,7 +247,7 @@ entropy(void)
if (!(fp = fopen("/proc/sys/kernel/random/entropy_avail", "r"))) {
fprintf(stderr, "Could not open entropy file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%d", &entropy);
@ -267,7 +270,7 @@ hostname(void)
if (!(fp = fopen("/proc/sys/kernel/hostname", "r"))) {
fprintf(stderr, "Could not open hostname file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%s\n", hostname);
@ -284,7 +287,7 @@ ip(const char *interface)
if (getifaddrs(&ifaddr) == -1) {
fprintf(stderr, "Error getting IP address.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
/* get the ip address */
@ -297,7 +300,7 @@ ip(const char *interface)
if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
if (s != 0) {
fprintf(stderr, "Error getting IP address.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
return smprintf("%s", host);
}
@ -306,7 +309,7 @@ ip(const char *interface)
/* free the address */
freeifaddrs(ifaddr);
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
static char *
@ -316,7 +319,7 @@ load_avg(void)
if (getloadavg(avgs, 3) < 0) {
fprintf(stderr, "Error getting load avg.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
@ -330,7 +333,7 @@ ram_free(void)
if (!(fp = fopen("/proc/meminfo", "r"))) {
fprintf(stderr, "Error opening meminfo file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "MemFree: %ld kB\n", &free);
@ -347,7 +350,7 @@ ram_perc(void)
if (!(fp = fopen("/proc/meminfo", "r"))) {
fprintf(stderr, "Error opening meminfo file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "MemTotal: %ld kB\n", &total);
@ -368,7 +371,7 @@ ram_total(void)
if (!(fp = fopen("/proc/meminfo", "r"))) {
fprintf(stderr, "Error opening meminfo file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "MemTotal: %ld kB\n", &total);
@ -384,7 +387,7 @@ ram_used(void)
if (!(fp = fopen("/proc/meminfo", "r"))) {
fprintf(stderr, "Error opening meminfo file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "MemTotal: %ld kB\n", &total);
@ -406,7 +409,7 @@ run_command(const char* command)
if (!(fp = popen(command, "r"))) {
fprintf(stderr, "Could not get command output for: %s.\n", command);
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fgets(buffer, sizeof(buffer) - 1, fp);
@ -430,7 +433,7 @@ temp(const char *file)
if (!(fp = fopen(file, "r"))) {
fprintf(stderr, "Could not open temperature file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%d", &temperature);
@ -465,10 +468,10 @@ username(void)
return smprintf("%s", pw->pw_name);
else {
fprintf(stderr, "Could not get username.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
static char *
@ -482,10 +485,10 @@ uid(void)
return smprintf("%d", uid);
else {
fprintf(stderr, "Could not get uid.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
@ -507,10 +510,10 @@ vol_perc(const char *soundcard)
snd_mixer_selem_id_malloc(&mute_info);
if (vol_info == NULL || mute_info == NULL) {
fprintf(stderr, "Could not get alsa volume.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
snd_mixer_selem_id_set_name(vol_info, channel);
snd_mixer_selem_id_set_name(mute_info, channel);
snd_mixer_selem_id_set_name(vol_info, ALSA_CHANNEL);
snd_mixer_selem_id_set_name(mute_info, ALSA_CHANNEL);
pcm_mixer = snd_mixer_find_selem(handle, vol_info);
mas_mixer = snd_mixer_find_selem(handle, mute_info);
@ -550,17 +553,17 @@ wifi_perc(const char *wificard)
if(!(fp = fopen(path, "r"))) {
fprintf(stderr, "Error opening wifi operstate file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
fgets(status, 5, fp);
fclose(fp);
if(strcmp(status, "up\n") != 0)
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
if (!(fp = fopen("/proc/net/wireless", "r"))) {
fprintf(stderr, "Error opening wireless file.\n");
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
strlcpy(needle, wificard, sizeof(needle));
@ -589,16 +592,16 @@ wifi_essid(const char *wificard)
sprintf(wreq.ifr_name, wificard);
if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
fprintf(stderr, "Cannot open socket for interface: %s\n", wificard);
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
wreq.u.essid.pointer = id;
if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
fprintf(stderr, "Get ESSID ioctl failed for interface %s\n", wificard);
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
}
if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
return smprintf(unknowntext);
return smprintf(UNKNOWN_STR);
else
return smprintf("%s", (char *)wreq.u.essid.pointer);
}
@ -626,7 +629,7 @@ main(void)
res = argument.func(argument.args);
element = smprintf(argument.format, res);
if (element == NULL) {
element = smprintf(unknowntext);
element = smprintf(UNKNOWN_STR);
fprintf(stderr, "Failed to format output.\n");
}
strlcat(status_string, element, sizeof(status_string));
@ -635,7 +638,7 @@ main(void)
}
setstatus(status_string);
sleep(update_interval -1);
sleep(UPDATE_INTERVAL -1);
}
XCloseDisplay(dpy);