diff options
Diffstat (limited to 'init.c')
| -rw-r--r-- | init.c | 44 |
1 files changed, 16 insertions, 28 deletions
@@ -49,15 +49,12 @@ #include <linux/serial.h> /* for serial_struct */ #include <sys/vt.h> /* for vt_stat */ #include <sys/ioctl.h> +#include <sys/sysinfo.h> /* For check_free_memory() */ #include <linux/version.h> #ifdef BB_SYSLOGD #include <sys/syslog.h> #endif -#if ! defined BB_FEATURE_USE_PROCFS -#error Sorry, I depend on the /proc filesystem right now. -#endif - #ifndef KERNEL_VERSION #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) #endif @@ -226,25 +223,18 @@ void set_term(int fd) } /* How much memory does this machine have? */ -static int mem_total() +static int check_free_memory() { - char s[80]; - char *p = "/proc/meminfo"; - FILE *f; - const char pattern[] = "MemTotal:"; + struct sysinfo info; - if ((f = fopen(p, "r")) < 0) { - message(LOG, "Error opening %s: %s\n", p, strerror(errno)); + sysinfo(&info); + if (sysinfo(&info) != 0) { + message(LOG, "Error checking free memory: %s\n", strerror(errno)); return -1; } - while (NULL != fgets(s, 79, f)) { - p = strstr(s, pattern); - if (NULL != p) { - fclose(f); - return (atoi(p + strlen(pattern))); - } - } - return -1; + + return(info.freeram/1024); + } static void console_init() @@ -454,13 +444,13 @@ static void check_memory() { struct stat statBuf; - if (mem_total() > 3500) + if (check_free_memory() > 1000) return; if (stat("/etc/fstab", &statBuf) == 0) { /* Try to turn on swap */ system("/sbin/swapon -a"); - if (mem_total() < 3500) + if (check_free_memory() < 1000) goto goodnight; } else goto goodnight; @@ -555,6 +545,11 @@ static void reboot_signal(int sig) } #if defined BB_FEATURE_INIT_CHROOT + +#if ! defined BB_FEATURE_USE_PROCFS +#error Sorry, I depend on the /proc filesystem right now. +#endif + static void check_chroot(int sig) { char *argv_init[2] = { "init", NULL, }; @@ -853,13 +848,6 @@ extern int init_main(int argc, char **argv) #endif - /* Mount /proc */ - if (mount("proc", "/proc", "proc", 0, 0) == 0) { - message(LOG, "Mounting /proc: done.\n"); - kernelVersion = get_kernel_revision(); - } else - message(LOG | CONSOLE, "Mounting /proc: failed!\n"); - /* Make sure there is enough memory to do something useful. */ check_memory(); |