diff options
| -rw-r--r-- | free.c | 32 | ||||
| -rw-r--r-- | init.c | 44 | ||||
| -rw-r--r-- | init/init.c | 44 | ||||
| -rw-r--r-- | procps/free.c | 32 | ||||
| -rw-r--r-- | utility.c | 15 |
5 files changed, 87 insertions, 80 deletions
@@ -23,15 +23,33 @@ #include "internal.h" #include <stdio.h> +#include <sys/sysinfo.h> - -#if ! defined BB_FEATURE_USE_PROCFS -#error Sorry, I depend on the /proc filesystem right now. -#endif - +#define DIVISOR 1024 extern int free_main(int argc, char **argv) { - char *cmd[] = { "cat", "/proc/meminfo", "\0" }; + struct sysinfo info; + sysinfo(&info); + info.totalram/=DIVISOR; + info.freeram/=DIVISOR; + info.totalswap/=DIVISOR; + info.freeswap/=DIVISOR; + info.sharedram/=DIVISOR; + info.bufferram/=DIVISOR; + + + printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free", + "shared", "buffers"); + + printf("%6s%13ld%13ld%13ld%13ld%13ld\n", "Mem:", info.totalram, + info.totalram-info.freeram, info.freeram, + info.sharedram, info.bufferram); + + printf("%6s%13ld%13ld%13ld\n", "Swap:", info.totalswap, + info.totalswap-info.freeswap, info.freeswap); - exit(cat_main(3, cmd)); + printf("%6s%13ld%13ld%13ld\n", "Total:", info.totalram+info.totalswap, + (info.totalram-info.freeram)+(info.totalswap-info.freeswap), + info.freeram+info.freeswap); + exit(TRUE); } @@ -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(); diff --git a/init/init.c b/init/init.c index 4a19822..6ec8115 100644 --- a/init/init.c +++ b/init/init.c @@ -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(); diff --git a/procps/free.c b/procps/free.c index b071354..78a36fe 100644 --- a/procps/free.c +++ b/procps/free.c @@ -23,15 +23,33 @@ #include "internal.h" #include <stdio.h> +#include <sys/sysinfo.h> - -#if ! defined BB_FEATURE_USE_PROCFS -#error Sorry, I depend on the /proc filesystem right now. -#endif - +#define DIVISOR 1024 extern int free_main(int argc, char **argv) { - char *cmd[] = { "cat", "/proc/meminfo", "\0" }; + struct sysinfo info; + sysinfo(&info); + info.totalram/=DIVISOR; + info.freeram/=DIVISOR; + info.totalswap/=DIVISOR; + info.freeswap/=DIVISOR; + info.sharedram/=DIVISOR; + info.bufferram/=DIVISOR; + + + printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free", + "shared", "buffers"); + + printf("%6s%13ld%13ld%13ld%13ld%13ld\n", "Mem:", info.totalram, + info.totalram-info.freeram, info.freeram, + info.sharedram, info.bufferram); + + printf("%6s%13ld%13ld%13ld\n", "Swap:", info.totalswap, + info.totalswap-info.freeswap, info.freeswap); - exit(cat_main(3, cmd)); + printf("%6s%13ld%13ld%13ld\n", "Total:", info.totalram+info.totalswap, + (info.totalram-info.freeram)+(info.totalswap-info.freeswap), + info.freeram+info.freeswap); + exit(TRUE); } @@ -48,6 +48,7 @@ #include <unistd.h> #include <ctype.h> #include <sys/param.h> /* for PATH_MAX */ +#include <sys/utsname.h> /* for uname(2) */ #if defined BB_FEATURE_MOUNT_LOOP #include <fcntl.h> @@ -103,26 +104,20 @@ extern void fatalError(char *s, ...) } #if defined (BB_INIT) || defined (BB_PS) - -#if ! defined BB_FEATURE_USE_PROCFS -#error Sorry, I depend on the /proc filesystem right now. -#endif /* Returns kernel version encoded as major*65536 + minor*256 + patch, * so, for example, to check if the kernel is greater than 2.2.11: * if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> } */ int get_kernel_revision() { - FILE *file; + struct utsname name; int major = 0, minor = 0, patch = 0; - file = fopen("/proc/sys/kernel/osrelease", "r"); - if (file == NULL) { - /* bummer, /proc must not be mounted... */ + if (uname(&name) == -1) { + perror("cannot get system information"); return (0); } - fscanf(file, "%d.%d.%d", &major, &minor, &patch); - fclose(file); + sscanf(name.version, "%d.%d.%d", &major, &minor, &patch); return major * 65536 + minor * 256 + patch; } #endif /* BB_INIT || BB_PS */ |