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udevd: use fgets() to read /proc files

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Based on a patch by:
  George Beshers <gbeshers@sgi.com>
This commit is contained in:
Kay Sievers 2007-05-03 23:21:11 +02:00
parent 1d9cdcdf91
commit 9f1f67b168
1 changed files with 33 additions and 57 deletions
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90
udevd.c
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@ -318,61 +318,42 @@ static void msg_queue_insert(struct udevd_uevent_msg *msg)
static int mem_size_mb(void)
{
int f;
char buf[8192];
long int len;
const char *pos;
long int memsize;
FILE* f;
char buf[4096];
long int memsize = -1;
f = open("/proc/meminfo", O_RDONLY);
if (f == -1)
f = fopen("/proc/meminfo", "r");
if (f == NULL)
return -1;
len = read(f, buf, sizeof(buf)-1);
close(f);
while (fgets(buf, sizeof(buf), f) != NULL) {
long int value;
if (len <= 0)
return -1;
buf[len] = '\0';
if (sscanf(buf, "MemTotal: %ld kB", &value) == 1) {
memsize = value / 1024;
break;
}
}
pos = strstr(buf, "MemTotal: ");
if (pos == NULL)
return -1;
if (sscanf(pos, "MemTotal: %ld kB", &memsize) != 1)
return -1;
return memsize / 1024;
return memsize;
}
static int cpu_count(void)
{
int f;
char buf[65536];
int len;
const char *pos;
FILE* f;
char buf[4096];
int count = 0;
f = open("/proc/stat", O_RDONLY);
if (f == -1)
f = fopen("/proc/stat", "r");
if (f == NULL)
return -1;
len = read(f, buf, sizeof(buf)-1);
close(f);
if (len <= 0)
return -1;
buf[len] = '\0';
pos = strstr(buf, "cpu");
if (pos == NULL)
return -1;
while (pos != NULL) {
if (strncmp(pos, "cpu", 3) == 0 &&isdigit(pos[3]))
while (fgets(buf, sizeof(buf), f) != NULL) {
if (strncmp(buf, "cpu", 3) == 0 && isdigit(buf[3]))
count++;
pos = strstr(&pos[3], "cpu");
}
fclose(f);
if (count == 0)
return -1;
return count;
@ -380,29 +361,24 @@ static int cpu_count(void)
static int running_processes(void)
{
int f;
char buf[32768];
int len;
int running;
const char *pos;
FILE* f;
char buf[4096];
int running = -1;
f = open("/proc/stat", O_RDONLY);
if (f == -1)
f = fopen("/proc/stat", "r");
if (f == NULL)
return -1;
len = read(f, buf, sizeof(buf)-1);
close(f);
if (len <= 0)
return -1;
buf[len] = '\0';
while (fgets(buf, sizeof(buf), f) != NULL) {
int value;
pos = strstr(buf, "procs_running ");
if (pos == NULL)
return -1;
if (sscanf(pos, "procs_running %u", &running) != 1)
return -1;
if (sscanf(buf, "procs_running %u", &value) == 1) {
running = value;
break;
}
}
fclose(f);
return running;
}