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use a static buffer instead of dynamic memory

This commit is contained in:
Aaron Marcher 2017-06-13 00:06:04 +02:00
parent abbaa7af44
commit 597cdc6b5c
No known key found for this signature in database
GPG Key ID: 74B048E5C2474F9A
2 changed files with 204 additions and 242 deletions
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3
config.def.h
View File

@ -6,6 +6,9 @@
/* text to show if no value can be retrieved */ /* text to show if no value can be retrieved */
#define UNKNOWN_STR "n/a" #define UNKNOWN_STR "n/a"
/* maximum output string length */
#define MAXLEN 2048
/* statusbar /* statusbar
- battery_perc (battery percentage) [argument: battery name] - battery_perc (battery percentage) [argument: battery name]
- battery_power (battery power usage) [argument: battery name] - battery_power (battery power usage) [argument: battery name]

441
slstatus.c
View File

@ -28,45 +28,45 @@
#include "arg.h" #include "arg.h"
struct arg { struct arg {
char *(*func)(); const char *(*func)();
const char *fmt; const char *fmt;
const char *args; const char *args;
}; };
static char *smprintf(const char *fmt, ...); static const char *bprintf(const char *fmt, ...);
static char *battery_perc(const char *bat); static const char *battery_perc(const char *bat);
static char *battery_power(const char *bat); static const char *battery_power(const char *bat);
static char *battery_state(const char *bat); static const char *battery_state(const char *bat);
static char *cpu_freq(void); static const char *cpu_freq(void);
static char *cpu_perc(void); static const char *cpu_perc(void);
static char *datetime(const char *fmt); static const char *datetime(const char *fmt);
static char *disk_free(const char *mnt); static const char *disk_free(const char *mnt);
static char *disk_perc(const char *mnt); static const char *disk_perc(const char *mnt);
static char *disk_total(const char *mnt); static const char *disk_total(const char *mnt);
static char *disk_used(const char *mnt); static const char *disk_used(const char *mnt);
static char *entropy(void); static const char *entropy(void);
static char *gid(void); static const char *gid(void);
static char *hostname(void); static const char *hostname(void);
static char *ip(const char *iface); static const char *ip(const char *iface);
static char *kernel_release(void); static const char *kernel_release(void);
static char *keyboard_indicators(void); static const char *keyboard_indicators(void);
static char *load_avg(void); static const char *load_avg(void);
static char *ram_free(void); static const char *ram_free(void);
static char *ram_perc(void); static const char *ram_perc(void);
static char *ram_used(void); static const char *ram_used(void);
static char *ram_total(void); static const char *ram_total(void);
static char *run_command(const char *cmd); static const char *run_command(const char *cmd);
static char *swap_free(void); static const char *swap_free(void);
static char *swap_perc(void); static const char *swap_perc(void);
static char *swap_used(void); static const char *swap_used(void);
static char *swap_total(void); static const char *swap_total(void);
static char *temp(const char *file); static const char *temp(const char *file);
static char *uid(void); static const char *uid(void);
static char *uptime(void); static const char *uptime(void);
static char *username(void); static const char *username(void);
static char *vol_perc(const char *card); static const char *vol_perc(const char *card);
static char *wifi_perc(const char *iface); static const char *wifi_perc(const char *iface);
static char *wifi_essid(const char *iface); static const char *wifi_essid(const char *iface);
static void sighandler(const int signo); static void sighandler(const int signo);
static void usage(const int eval); static void usage(const int eval);
@ -78,30 +78,25 @@ static Display *dpy;
#include "config.h" #include "config.h"
static char * static char buf[MAXLEN];
smprintf(const char *fmt, ...)
static const char *
bprintf(const char *fmt, ...)
{ {
va_list ap; va_list ap;
char *ret; size_t len;
int len;
va_start(ap, fmt); va_start(ap, fmt);
len = vsnprintf(NULL, 0, fmt, ap); len = vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
va_end(ap); va_end(ap);
ret = malloc(++len); if (len >= sizeof(buf))
if (ret == NULL) { buf[sizeof(buf)-1] = '\0';
err(1, "malloc");
}
va_start(ap, fmt); return buf;
vsnprintf(ret, len, fmt, ap);
va_end(ap);
return ret;
} }
static char * static const char *
battery_perc(const char *bat) battery_perc(const char *bat)
{ {
int perc; int perc;
@ -112,15 +107,15 @@ battery_perc(const char *bat)
fp = fopen(path, "r"); fp = fopen(path, "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file %s", path); warn("Failed to open file %s", path);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "%i", &perc); fscanf(fp, "%i", &perc);
fclose(fp); fclose(fp);
return smprintf("%d", perc); return bprintf("%d", perc);
} }
static char * static const char *
battery_power(const char *bat) battery_power(const char *bat)
{ {
char path[PATH_MAX]; char path[PATH_MAX];
@ -131,15 +126,15 @@ battery_power(const char *bat)
fp = fopen(path, "r"); fp = fopen(path, "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file %s", path); warn("Failed to open file %s", path);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "%i", &watts); fscanf(fp, "%i", &watts);
fclose(fp); fclose(fp);
return smprintf("%d", (watts + 500000) / 1000000); return bprintf("%d", (watts + 500000) / 1000000);
} }
static char * static const char *
battery_state(const char *bat) battery_state(const char *bat)
{ {
char path[PATH_MAX]; char path[PATH_MAX];
@ -150,25 +145,25 @@ battery_state(const char *bat)
fp = fopen(path, "r"); fp = fopen(path, "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file %s", path); warn("Failed to open file %s", path);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "%12s", state); fscanf(fp, "%12s", state);
fclose(fp); fclose(fp);
if (strcmp(state, "Charging") == 0) { if (strcmp(state, "Charging") == 0) {
return smprintf("+"); return "+";
} else if (strcmp(state, "Discharging") == 0) { } else if (strcmp(state, "Discharging") == 0) {
return smprintf("-"); return "-";
} else if (strcmp(state, "Full") == 0) { } else if (strcmp(state, "Full") == 0) {
return smprintf("="); return "=";
} else if (strcmp(state, "Unknown") == 0) { } else if (strcmp(state, "Unknown") == 0) {
return smprintf("/"); return "/";
} else { } else {
return smprintf("?"); return "?";
} }
} }
static char * static const char *
cpu_freq(void) cpu_freq(void)
{ {
int freq; int freq;
@ -177,15 +172,15 @@ cpu_freq(void)
fp = fopen("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq", "r"); fp = fopen("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq"); warn("Failed to open file /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "%i", &freq); fscanf(fp, "%i", &freq);
fclose(fp); fclose(fp);
return smprintf("%d", (freq + 500) / 1000); return bprintf("%d", (freq + 500) / 1000);
} }
static char * static const char *
cpu_perc(void) cpu_perc(void)
{ {
int perc; int perc;
@ -195,7 +190,7 @@ cpu_perc(void)
fp = fopen("/proc/stat", "r"); fp = fopen("/proc/stat", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/stat"); warn("Failed to open file /proc/stat");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]); fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
fclose(fp); fclose(fp);
@ -206,43 +201,41 @@ cpu_perc(void)
fp = fopen("/proc/stat", "r"); fp = fopen("/proc/stat", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/stat"); warn("Failed to open file /proc/stat");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]); fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
fclose(fp); fclose(fp);
perc = 100 * ((b[0]+b[1]+b[2]) - (a[0]+a[1]+a[2])) / ((b[0]+b[1]+b[2]+b[3]) - (a[0]+a[1]+a[2]+a[3])); perc = 100 * ((b[0]+b[1]+b[2]) - (a[0]+a[1]+a[2])) / ((b[0]+b[1]+b[2]+b[3]) - (a[0]+a[1]+a[2]+a[3]));
return smprintf("%d", perc); return bprintf("%d", perc);
} }
static char * static const char *
datetime(const char *fmt) datetime(const char *fmt)
{ {
time_t t; time_t t;
char str[80];
t = time(NULL); t = time(NULL);
if (strftime(str, sizeof(str), fmt, localtime(&t)) == 0) { if (strftime(buf, sizeof(buf), fmt, localtime(&t)) == 0)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
return smprintf("%s", str); return buf;
} }
static char * static const char *
disk_free(const char *mnt) disk_free(const char *mnt)
{ {
struct statvfs fs; struct statvfs fs;
if (statvfs(mnt, &fs) < 0) { if (statvfs(mnt, &fs) < 0) {
warn("Failed to get filesystem info"); warn("Failed to get filesystem info");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024); return bprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
} }
static char * static const char *
disk_perc(const char *mnt) disk_perc(const char *mnt)
{ {
int perc; int perc;
@ -250,41 +243,41 @@ disk_perc(const char *mnt)
if (statvfs(mnt, &fs) < 0) { if (statvfs(mnt, &fs) < 0) {
warn("Failed to get filesystem info"); warn("Failed to get filesystem info");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks)); perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
return smprintf("%d", perc); return bprintf("%d", perc);
} }
static char * static const char *
disk_total(const char *mnt) disk_total(const char *mnt)
{ {
struct statvfs fs; struct statvfs fs;
if (statvfs(mnt, &fs) < 0) { if (statvfs(mnt, &fs) < 0) {
warn("Failed to get filesystem info"); warn("Failed to get filesystem info");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024); return bprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
} }
static char * static const char *
disk_used(const char *mnt) disk_used(const char *mnt)
{ {
struct statvfs fs; struct statvfs fs;
if (statvfs(mnt, &fs) < 0) { if (statvfs(mnt, &fs) < 0) {
warn("Failed to get filesystem info"); warn("Failed to get filesystem info");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024); return bprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
} }
static char * static const char *
entropy(void) entropy(void)
{ {
int num; int num;
@ -293,34 +286,32 @@ entropy(void)
fp= fopen("/proc/sys/kernel/random/entropy_avail", "r"); fp= fopen("/proc/sys/kernel/random/entropy_avail", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/sys/kernel/random/entropy_avail"); warn("Failed to open file /proc/sys/kernel/random/entropy_avail");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "%d", &num); fscanf(fp, "%d", &num);
fclose(fp); fclose(fp);
return smprintf("%d", num); return bprintf("%d", num);
} }
static char * static const char *
gid(void) gid(void)
{ {
return smprintf("%d", getgid()); return bprintf("%d", getgid());
} }
static char * static const char *
hostname(void) hostname(void)
{ {
char buf[HOST_NAME_MAX];
if (gethostname(buf, sizeof(buf)) == -1) { if (gethostname(buf, sizeof(buf)) == -1) {
warn("hostname"); warn("hostname");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
return smprintf("%s", buf); return buf;
} }
static char * static const char *
ip(const char *iface) ip(const char *iface)
{ {
struct ifaddrs *ifaddr, *ifa; struct ifaddrs *ifaddr, *ifa;
@ -329,7 +320,7 @@ ip(const char *iface)
if (getifaddrs(&ifaddr) == -1) { if (getifaddrs(&ifaddr) == -1) {
warn("Failed to get IP address for interface %s", iface); warn("Failed to get IP address for interface %s", iface);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
@ -340,30 +331,30 @@ ip(const char *iface)
if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) { if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
if (s != 0) { if (s != 0) {
warnx("Failed to get IP address for interface %s", iface); warnx("Failed to get IP address for interface %s", iface);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
return smprintf("%s", host); return bprintf("%s", host);
} }
} }
freeifaddrs(ifaddr); freeifaddrs(ifaddr);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
static char * static const char *
kernel_release(void) kernel_release(void)
{ {
struct utsname udata; struct utsname udata;
if (uname(&udata) < 0) { if (uname(&udata) < 0) {
return smprintf(UNKNOWN_STR); return UNKNOWN_STR;
} }
return smprintf("%s", udata.release); return bprintf("%s", udata.release);
} }
static char * static const char *
keyboard_indicators(void) keyboard_indicators(void)
{ {
Display *dpy = XOpenDisplay(NULL); Display *dpy = XOpenDisplay(NULL);
@ -373,33 +364,30 @@ keyboard_indicators(void)
switch (state.led_mask) { switch (state.led_mask) {
case 1: case 1:
return smprintf("c"); return "c";
break;
case 2: case 2:
return smprintf("n"); return "n";
break;
case 3: case 3:
return smprintf("cn"); return "cn";
break;
default: default:
return smprintf(""); return "";
} }
} }
static char * static const char *
load_avg(void) load_avg(void)
{ {
double avgs[3]; double avgs[3];
if (getloadavg(avgs, 3) < 0) { if (getloadavg(avgs, 3) < 0) {
warnx("Failed to get the load avg"); warnx("Failed to get the load avg");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]); return bprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
} }
static char * static const char *
ram_free(void) ram_free(void)
{ {
long free; long free;
@ -408,15 +396,15 @@ ram_free(void)
fp = fopen("/proc/meminfo", "r"); fp = fopen("/proc/meminfo", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/meminfo"); warn("Failed to open file /proc/meminfo");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "MemFree: %ld kB\n", &free); fscanf(fp, "MemFree: %ld kB\n", &free);
fclose(fp); fclose(fp);
return smprintf("%f", (float)free / 1024 / 1024); return bprintf("%f", (float)free / 1024 / 1024);
} }
static char * static const char *
ram_perc(void) ram_perc(void)
{ {
long total, free, buffers, cached; long total, free, buffers, cached;
@ -425,7 +413,7 @@ ram_perc(void)
fp = fopen("/proc/meminfo", "r"); fp = fopen("/proc/meminfo", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/meminfo"); warn("Failed to open file /proc/meminfo");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "MemTotal: %ld kB\n", &total); fscanf(fp, "MemTotal: %ld kB\n", &total);
fscanf(fp, "MemFree: %ld kB\n", &free); fscanf(fp, "MemFree: %ld kB\n", &free);
@ -433,10 +421,10 @@ ram_perc(void)
fscanf(fp, "Cached: %ld kB\n", &cached); fscanf(fp, "Cached: %ld kB\n", &cached);
fclose(fp); fclose(fp);
return smprintf("%d", 100 * ((total - free) - (buffers + cached)) / total); return bprintf("%d", 100 * ((total - free) - (buffers + cached)) / total);
} }
static char * static const char *
ram_total(void) ram_total(void)
{ {
long total; long total;
@ -445,15 +433,15 @@ ram_total(void)
fp = fopen("/proc/meminfo", "r"); fp = fopen("/proc/meminfo", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/meminfo"); warn("Failed to open file /proc/meminfo");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "MemTotal: %ld kB\n", &total); fscanf(fp, "MemTotal: %ld kB\n", &total);
fclose(fp); fclose(fp);
return smprintf("%f", (float)total / 1024 / 1024); return bprintf("%f", (float)total / 1024 / 1024);
} }
static char * static const char *
ram_used(void) ram_used(void)
{ {
long free, total, buffers, cached; long free, total, buffers, cached;
@ -462,7 +450,7 @@ ram_used(void)
fp = fopen("/proc/meminfo", "r"); fp = fopen("/proc/meminfo", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/meminfo"); warn("Failed to open file /proc/meminfo");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "MemTotal: %ld kB\n", &total); fscanf(fp, "MemTotal: %ld kB\n", &total);
fscanf(fp, "MemFree: %ld kB\n", &free); fscanf(fp, "MemFree: %ld kB\n", &free);
@ -470,184 +458,159 @@ ram_used(void)
fscanf(fp, "Cached: %ld kB\n", &cached); fscanf(fp, "Cached: %ld kB\n", &cached);
fclose(fp); fclose(fp);
return smprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024); return bprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024);
} }
static char * static const char *
run_command(const char *cmd) run_command(const char *cmd)
{ {
char *nlptr; char *nlptr;
FILE *fp; FILE *fp;
char buf[1024] = UNKNOWN_STR;
fp = popen(cmd, "r"); fp = popen(cmd, "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to get command output for %s", cmd); warn("Failed to get command output for %s", cmd);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fgets(buf, sizeof(buf), fp); fgets(buf, sizeof(buf) - 1, fp);
pclose(fp); pclose(fp);
buf[sizeof(buf) - 1] = '\0'; if ((nlptr = strrchr(buf, '\n')) != NULL)
if ((nlptr = strrchr(buf, '\n')) != NULL) {
nlptr[0] = '\0'; nlptr[0] = '\0';
}
return smprintf("%s", buf); return buf[0] ? buf : UNKNOWN_STR;
} }
static char * static const char *
swap_free(void) swap_free(void)
{ {
long total, free; long total, free;
FILE *fp; FILE *fp;
char buf[2048];
size_t bytes_read; size_t bytes_read;
char *match; char *match;
fp = fopen("/proc/meminfo", "r"); fp = fopen("/proc/meminfo", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/meminfo"); warn("Failed to open file /proc/meminfo");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
warn("swap_free: read error"); warn("swap_free: read error");
fclose(fp); fclose(fp);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
buf[bytes_read] = '\0';
fclose(fp); fclose(fp);
if ((match = strstr(buf, "SwapTotal")) == NULL) { if ((match = strstr(buf, "SwapTotal")) == NULL)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
sscanf(match, "SwapTotal: %ld kB\n", &total); sscanf(match, "SwapTotal: %ld kB\n", &total);
if ((match = strstr(buf, "SwapFree")) == NULL) { if ((match = strstr(buf, "SwapFree")) == NULL)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
sscanf(match, "SwapFree: %ld kB\n", &free); sscanf(match, "SwapFree: %ld kB\n", &free);
return smprintf("%f", (float)free / 1024 / 1024); return bprintf("%f", (float)free / 1024 / 1024);
} }
static char * static const char *
swap_perc(void) swap_perc(void)
{ {
long total, free, cached; long total, free, cached;
FILE *fp; FILE *fp;
char buf[2048];
size_t bytes_read; size_t bytes_read;
char *match; char *match;
fp = fopen("/proc/meminfo", "r"); fp = fopen("/proc/meminfo", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/meminfo"); warn("Failed to open file /proc/meminfo");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
warn("swap_perc: read error"); warn("swap_perc: read error");
fclose(fp); fclose(fp);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
buf[bytes_read] = '\0';
fclose(fp); fclose(fp);
if ((match = strstr(buf, "SwapTotal")) == NULL) { if ((match = strstr(buf, "SwapTotal")) == NULL)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
sscanf(match, "SwapTotal: %ld kB\n", &total); sscanf(match, "SwapTotal: %ld kB\n", &total);
if ((match = strstr(buf, "SwapCached")) == NULL) { if ((match = strstr(buf, "SwapCached")) == NULL)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
sscanf(match, "SwapCached: %ld kB\n", &cached); sscanf(match, "SwapCached: %ld kB\n", &cached);
if ((match = strstr(buf, "SwapFree")) == NULL) { if ((match = strstr(buf, "SwapFree")) == NULL)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
sscanf(match, "SwapFree: %ld kB\n", &free); sscanf(match, "SwapFree: %ld kB\n", &free);
return smprintf("%d", 100 * (total - free - cached) / total); return bprintf("%d", 100 * (total - free - cached) / total);
} }
static char * static const char *
swap_total(void) swap_total(void)
{ {
long total; long total;
FILE *fp; FILE *fp;
char buf[2048];
size_t bytes_read; size_t bytes_read;
char *match; char *match;
fp = fopen("/proc/meminfo", "r"); fp = fopen("/proc/meminfo", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/meminfo"); warn("Failed to open file /proc/meminfo");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
warn("swap_total: read error"); warn("swap_total: read error");
fclose(fp); fclose(fp);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
buf[bytes_read] = '\0';
fclose(fp); fclose(fp);
if ((match = strstr(buf, "SwapTotal")) == NULL) { if ((match = strstr(buf, "SwapTotal")) == NULL)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
sscanf(match, "SwapTotal: %ld kB\n", &total); sscanf(match, "SwapTotal: %ld kB\n", &total);
return smprintf("%f", (float)total / 1024 / 1024); return bprintf("%f", (float)total / 1024 / 1024);
} }
static char * static const char *
swap_used(void) swap_used(void)
{ {
long total, free, cached; long total, free, cached;
FILE *fp; FILE *fp;
char buf[2048];
size_t bytes_read; size_t bytes_read;
char *match; char *match;
fp = fopen("/proc/meminfo", "r"); fp = fopen("/proc/meminfo", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/meminfo"); warn("Failed to open file /proc/meminfo");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
warn("swap_used: read error"); warn("swap_used: read error");
fclose(fp); fclose(fp);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
buf[bytes_read] = '\0';
fclose(fp); fclose(fp);
if ((match = strstr(buf, "SwapTotal")) == NULL) { if ((match = strstr(buf, "SwapTotal")) == NULL)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
sscanf(match, "SwapTotal: %ld kB\n", &total); sscanf(match, "SwapTotal: %ld kB\n", &total);
if ((match = strstr(buf, "SwapCached")) == NULL) { if ((match = strstr(buf, "SwapCached")) == NULL)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
sscanf(match, "SwapCached: %ld kB\n", &cached); sscanf(match, "SwapCached: %ld kB\n", &cached);
if ((match = strstr(buf, "SwapFree")) == NULL) { if ((match = strstr(buf, "SwapFree")) == NULL)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
sscanf(match, "SwapFree: %ld kB\n", &free); sscanf(match, "SwapFree: %ld kB\n", &free);
return smprintf("%f", (float)(total - free - cached) / 1024 / 1024); return bprintf("%f", (float)(total - free - cached) / 1024 / 1024);
} }
static char * static const char *
temp(const char *file) temp(const char *file)
{ {
int temp; int temp;
@ -656,15 +619,15 @@ temp(const char *file)
fp = fopen(file, "r"); fp = fopen(file, "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file %s", file); warn("Failed to open file %s", file);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fscanf(fp, "%d", &temp); fscanf(fp, "%d", &temp);
fclose(fp); fclose(fp);
return smprintf("%d", temp / 1000); return bprintf("%d", temp / 1000);
} }
static char * static const char *
uptime(void) uptime(void)
{ {
struct sysinfo info; struct sysinfo info;
@ -675,30 +638,30 @@ uptime(void)
h = info.uptime / 3600; h = info.uptime / 3600;
m = (info.uptime - h * 3600 ) / 60; m = (info.uptime - h * 3600 ) / 60;
return smprintf("%dh %dm", h, m); return bprintf("%dh %dm", h, m);
} }
static char * static const char *
username(void) username(void)
{ {
struct passwd *pw = getpwuid(geteuid()); struct passwd *pw = getpwuid(geteuid());
if (pw == NULL) { if (pw == NULL) {
warn("Failed to get username"); warn("Failed to get username");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
return smprintf("%s", pw->pw_name); return bprintf("%s", pw->pw_name);
} }
static char * static const char *
uid(void) uid(void)
{ {
return smprintf("%d", geteuid()); return bprintf("%d", geteuid());
} }
static char * static const char *
vol_perc(const char *card) vol_perc(const char *card)
{ {
unsigned int i; unsigned int i;
@ -708,34 +671,33 @@ vol_perc(const char *card)
afd = open(card, O_RDONLY | O_NONBLOCK); afd = open(card, O_RDONLY | O_NONBLOCK);
if (afd == -1) { if (afd == -1) {
warn("Cannot open %s", card); warn("Cannot open %s", card);
return smprintf(UNKNOWN_STR); return UNKNOWN_STR;
} }
if (ioctl(afd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) { if (ioctl(afd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) {
warn("Cannot get volume for %s", card); warn("Cannot get volume for %s", card);
close(afd); close(afd);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
for (i = 0; i < (sizeof(vnames) / sizeof((vnames[0]))); i++) { for (i = 0; i < (sizeof(vnames) / sizeof((vnames[0]))); i++) {
if (devmask & (1 << i) && !strcmp("vol", vnames[i])) { if (devmask & (1 << i) && !strcmp("vol", vnames[i])) {
if (ioctl(afd, MIXER_READ(i), &v) == -1) { if (ioctl(afd, MIXER_READ(i), &v) == -1) {
warn("vol_perc: ioctl"); warn("vol_perc: ioctl");
close(afd); close(afd);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
} }
} }
close(afd); close(afd);
return smprintf("%d", v & 0xff); return bprintf("%d", v & 0xff);
} }
static char * static const char *
wifi_perc(const char *iface) wifi_perc(const char *iface)
{ {
int perc; int perc;
char buf[255];
char *datastart; char *datastart;
char path[PATH_MAX]; char path[PATH_MAX];
char status[5]; char status[5];
@ -745,38 +707,38 @@ wifi_perc(const char *iface)
fp = fopen(path, "r"); fp = fopen(path, "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file %s", path); warn("Failed to open file %s", path);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fgets(status, 5, fp); fgets(status, 5, fp);
fclose(fp); fclose(fp);
if(strcmp(status, "up\n") != 0) { if(strcmp(status, "up\n") != 0) {
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fp = fopen("/proc/net/wireless", "r"); fp = fopen("/proc/net/wireless", "r");
if (fp == NULL) { if (fp == NULL) {
warn("Failed to open file /proc/net/wireless"); warn("Failed to open file /proc/net/wireless");
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
fgets(buf, sizeof(buf), fp); fgets(buf, sizeof(buf) - 1, fp);
fgets(buf, sizeof(buf), fp); fgets(buf, sizeof(buf) - 1, fp);
fgets(buf, sizeof(buf), fp); fgets(buf, sizeof(buf) - 1, fp);
fclose(fp); fclose(fp);
if ((datastart = strstr(buf, iface)) == NULL) { if ((datastart = strstr(buf, iface)) == NULL)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
}
datastart = (datastart+(strlen(iface)+1)); datastart = (datastart+(strlen(iface)+1));
sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &perc); sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &perc);
return smprintf("%d", perc); return bprintf("%d", perc);
} }
static char * static const char *
wifi_essid(const char *iface) wifi_essid(const char *iface)
{ {
char id[IW_ESSID_MAX_SIZE+1]; static char id[IW_ESSID_MAX_SIZE+1];
int sockfd = socket(AF_INET, SOCK_DGRAM, 0); int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
struct iwreq wreq; struct iwreq wreq;
@ -786,20 +748,20 @@ wifi_essid(const char *iface)
if (sockfd == -1) { if (sockfd == -1) {
warn("Failed to get ESSID for interface %s", iface); warn("Failed to get ESSID for interface %s", iface);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
wreq.u.essid.pointer = id; wreq.u.essid.pointer = id;
if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) { if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
warn("Failed to get ESSID for interface %s", iface); warn("Failed to get ESSID for interface %s", iface);
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
} }
close(sockfd); close(sockfd);
if (strcmp((char *)wreq.u.essid.pointer, "") == 0) if (strcmp(id, "") == 0)
return smprintf("%s", UNKNOWN_STR); return UNKNOWN_STR;
else else
return smprintf("%s", (char *)wreq.u.essid.pointer); return id;
} }
static void static void
@ -821,10 +783,11 @@ int
main(int argc, char *argv[]) main(int argc, char *argv[])
{ {
unsigned short int i; unsigned short int i;
char status_string[2048]; char status_string[MAXLEN];
char *res, *element; char *element;
struct arg argument; struct arg argument;
struct sigaction act; struct sigaction act;
size_t len;
ARGBEGIN { ARGBEGIN {
case 'd': case 'd':
@ -866,21 +829,17 @@ main(int argc, char *argv[])
while (!done) { while (!done) {
status_string[0] = '\0'; status_string[0] = '\0';
for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) { for (element = status_string, i = len = 0;
i < sizeof(args) / sizeof(args[0]);
++i, element += len) {
argument = args[i]; argument = args[i];
if (argument.args == NULL) { len = snprintf(element, sizeof(status_string)-1 - len,
res = argument.func(); argument.fmt,
} else { argument.func(argument.args));
res = argument.func(argument.args); if (len >= sizeof(status_string)) {
status_string[sizeof(status_string)-1] = '\0';
break;
} }
element = smprintf(argument.fmt, res);
if (element == NULL) {
element = smprintf("%s", UNKNOWN_STR);
warnx("Failed to format output");
}
strncat(status_string, element, sizeof(status_string) - strlen(status_string) - 1);
free(res);
free(element);
} }
if (oflag) { if (oflag) {