/*
* Mini ps implementation(s) for busybox
*
- * Copyright (C) 1999 by Lineo, inc. Written by Erik Andersen
- * <andersen@lineo.com>, <andersee@debian.org>
+ * Copyright (C) 1999,2000,2001 by Lineo, inc.
+ *
Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
*
* This contains _two_ implementations of ps for Linux. One uses the
*
*/
-#include "internal.h"
#include <stdio.h>
+#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
+#include <string.h>
#include <sys/ioctl.h>
+#include "busybox.h"
+static const int TERMINAL_WIDTH = 79; /* not 80 in case terminal has linefold bug */
-#if ! defined BB_FEATURE_USE_DEVPS_N_DEVMTAB
+
+
+#if ! defined BB_FEATURE_USE_DEVPS_PATCH
/* The following is the first ps implementation --
* the one using the /proc virtual filesystem.
*/
-#if ! defined BB_FEATURE_USE_PROCFS
-#error Sorry, I depend on the /proc filesystem right now.
-#endif
-
typedef struct proc_s {
char
cmd[16]; /* basename of executable file in call to exec(2) */
if (tmp)
sscanf(tmp, "Pid:\t%d\n" "PPid:\t%d\n", &P->pid, &P->ppid);
else
- fprintf(stderr, "Internal error!\n");
+ error_msg("Internal error!");
/* For busybox, ignoring effective, saved, etc */
tmp = strstr(S, "Uid:");
if (tmp)
sscanf(tmp, "Uid:\t%d", &P->ruid);
else
- fprintf(stderr, "Internal error!\n");
+ error_msg("Internal error!");
tmp = strstr(S, "Gid:");
if (tmp)
sscanf(tmp, "Gid:\t%d", &P->rgid);
else
- fprintf(stderr, "Internal error!\n");
+ error_msg("Internal error!");
}
-
extern int ps_main(int argc, char **argv)
{
proc_t p;
FILE *file;
struct dirent *entry;
char path[32], sbuf[512];
- char uidName[10] = "";
- char groupName[10] = "";
+ char uidName[9];
+ char groupName[9];
int len, i, c;
#ifdef BB_FEATURE_AUTOWIDTH
- struct winsize win = { 0, 0 };
- int terminal_width = 0;
+ struct winsize win = { 0, 0, 0, 0 };
+ int terminal_width = TERMINAL_WIDTH;
#else
-#define terminal_width 79
+#define terminal_width TERMINAL_WIDTH
#endif
- if (argc > 1 && **(argv + 1) == '-')
- usage ("ps\n\nReport process status\n\nThis version of ps accepts no options.\n");
-
dir = opendir("/proc");
if (!dir)
- fatalError("Can't open /proc");
+ error_msg_and_die("Can't open /proc");
#ifdef BB_FEATURE_AUTOWIDTH
ioctl(fileno(stdout), TIOCGWINSZ, &win);
terminal_width = win.ws_col - 1;
#endif
- fprintf(stdout, "%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid",
- "State", "Command");
+ printf("%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid", "State", "Command");
while ((entry = readdir(dir)) != NULL) {
- uidName[0] = '\0';
- groupName[0] = '\0';
-
if (!isdigit(*entry->d_name))
continue;
sprintf(path, "/proc/%s/status", entry->d_name);
if (*groupName == '\0')
sprintf(groupName, "%d", p.rgid);
- len = fprintf(stdout, "%5d %-8s %-8s %c ", p.pid, uidName, groupName,
- p.state);
sprintf(path, "/proc/%s/cmdline", entry->d_name);
file = fopen(path, "r");
if (file == NULL)
- fatalError("Can't open %s: %s\n", path, strerror(errno));
+ continue;
i = 0;
+ len = printf("%5d %-8s %-8s %c ", p.pid, uidName, groupName, p.state);
while (((c = getc(file)) != EOF) && (i < (terminal_width-len))) {
i++;
if (c == '\0')
c = ' ';
putc(c, stdout);
}
+ fclose(file);
if (i == 0)
- fprintf(stdout, "[%s]", p.cmd);
- fprintf(stdout, "\n");
+ printf("[%s]", p.cmd);
+ putchar('\n');
}
closedir(dir);
- exit(TRUE);
+ return EXIT_SUCCESS;
}
-#else /* BB_FEATURE_USE_DEVPS_N_DEVMTAB */
+#else /* BB_FEATURE_USE_DEVPS_PATCH */
/* The following is the second ps implementation --
* this one uses the nifty new devps kernel device.
*/
-#include <linux/devps.h>
+#include <linux/devps.h> /* For Erik's nifty devps device driver */
extern int ps_main(int argc, char **argv)
pid_t num_pids;
pid_t* pid_array = NULL;
struct pid_info info;
- char uidName[10] = "";
- char groupName[10] = "";
+ char uidName[9];
+ char groupName[9];
#ifdef BB_FEATURE_AUTOWIDTH
- struct winsize win = { 0, 0 };
- int terminal_width = 0;
+ struct winsize win = { 0, 0, 0, 0 };
+ int terminal_width = TERMINAL_WIDTH;
#else
-#define terminal_width 79
+#define terminal_width TERMINAL_WIDTH
#endif
if (argc > 1 && **(argv + 1) == '-')
- usage("ps-devps\n\nReport process status\n\nThis version of ps accepts no options.\n\n");
+ show_usage();
/* open device */
fd = open(device, O_RDONLY);
if (fd < 0)
- fatalError( "open failed for `%s': %s\n", device, strerror (errno));
+ perror_msg_and_die( "open failed for `%s'", device);
/* Find out how many processes there are */
if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0)
- fatalError( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
+ perror_msg_and_die( "\nDEVPS_GET_PID_LIST");
/* Allocate some memory -- grab a few extras just in case
* some new processes start up while we wait. The kernel will
* just ignore any extras if we give it too many, and will trunc.
* the list if we give it too few. */
- pid_array = (pid_t*) calloc( num_pids+10, sizeof(pid_t));
+ pid_array = (pid_t*) xcalloc( num_pids+10, sizeof(pid_t));
pid_array[0] = num_pids+10;
/* Now grab the pid list */
if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0)
- fatalError("\nDEVPS_GET_PID_LIST: %s\n", strerror (errno));
+ perror_msg_and_die("\nDEVPS_GET_PID_LIST");
#ifdef BB_FEATURE_AUTOWIDTH
ioctl(fileno(stdout), TIOCGWINSZ, &win);
#endif
/* Print up a ps listing */
- fprintf(stdout, "%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid",
- "State", "Command");
+ printf("%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid", "State", "Command");
for (i=1; i<pid_array[0] ; i++) {
- uidName[0] = '\0';
- groupName[0] = '\0';
info.pid = pid_array[i];
if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
- fatalError("\nDEVPS_GET_PID_INFO: %s\n", strerror (errno));
+ perror_msg_and_die("\nDEVPS_GET_PID_INFO");
/* Make some adjustments as needed */
my_getpwuid(uidName, info.euid);
if (*groupName == '\0')
sprintf(groupName, "%ld", info.egid);
- len = fprintf(stdout, "%5d %-8s %-8s %c ", info.pid, uidName, groupName, info.state);
+ len = printf("%5d %-8s %-8s %c ", info.pid, uidName, groupName, info.state);
if (strlen(info.command_line) > 1) {
for( j=0; j<(sizeof(info.command_line)-1) && j < (terminal_width-len); j++) {
}
}
*(info.command_line+j) = '\0';
- fprintf(stdout, "%s\n", info.command_line);
+ puts(info.command_line);
} else {
- fprintf(stdout, "[%s]\n", info.name);
+ printf("[%s]\n", info.name);
}
}
/* close device */
if (close (fd) != 0)
- fatalError("close failed for `%s': %s\n", device, strerror (errno));
+ perror_msg_and_die("close failed for `%s'", device);
exit (0);
}
-#endif /* BB_FEATURE_USE_DEVPS_N_DEVMTAB */
+#endif /* BB_FEATURE_USE_DEVPS_PATCH */
projects / oweals / busybox.git / blobdiff