+/* vi: set sw=4 ts=4: */
/*
* Mini ps implementation for busybox
*
#endif
typedef struct proc_s {
- char
- cmd[16]; /* basename of executable file in call to exec(2) */
- int
- ruid, rgid, /* real only (sorry) */
- pid, /* process id */
- ppid; /* pid of parent process */
- char
- state; /* single-char code for process state (S=sleeping) */
+ char
+ cmd[16]; /* basename of executable file in call to exec(2) */
+ int
+ ruid, rgid, /* real only (sorry) */
+ pid, /* process id */
+ ppid; /* pid of parent process */
+ char
+ state; /* single-char code for process state (S=sleeping) */
} proc_t;
-static int file2str(char *filename, char *ret, int cap)
+static int file2str(char *filename, char *ret, int cap)
{
- int fd, num_read;
-
- if ( (fd = open(filename, O_RDONLY, 0)) == -1 ) return -1;
- if ( (num_read = read(fd, ret, cap - 1)) <= 0 ) return -1;
- ret[num_read] = 0;
- close(fd);
- return num_read;
+ int fd, num_read;
+
+ if ((fd = open(filename, O_RDONLY, 0)) == -1)
+ return -1;
+ if ((num_read = read(fd, ret, cap - 1)) <= 0)
+ return -1;
+ ret[num_read] = 0;
+ close(fd);
+ return num_read;
}
-static void parse_proc_status(char* S, proc_t* P)
+static void parse_proc_status(char *S, proc_t * P)
{
- char* tmp;
- memset(P->cmd, 0, sizeof P->cmd);
- sscanf (S, "Name:\t%15c", P->cmd);
- tmp = strchr(P->cmd,'\n');
- if (tmp)
- *tmp='\0';
- tmp = strstr (S,"State");
- sscanf (tmp, "State:\t%c", &P->state);
-
- tmp = strstr (S,"Pid:");
- if(tmp) sscanf (tmp,
- "Pid:\t%d\n"
- "PPid:\t%d\n",
- &P->pid,
- &P->ppid
- );
- else fprintf(stderr, "Internal error!\n");
-
- /* 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");
-
- tmp = strstr (S,"Gid:");
- if(tmp) sscanf (tmp,
- "Gid:\t%d", &P->rgid);
- else fprintf(stderr, "Internal error!\n");
+ char *tmp;
+
+ memset(P->cmd, 0, sizeof P->cmd);
+ sscanf(S, "Name:\t%15c", P->cmd);
+ tmp = strchr(P->cmd, '\n');
+ if (tmp)
+ *tmp = '\0';
+ tmp = strstr(S, "State");
+ sscanf(tmp, "State:\t%c", &P->state);
+
+ tmp = strstr(S, "Pid:");
+ if (tmp)
+ sscanf(tmp, "Pid:\t%d\n" "PPid:\t%d\n", &P->pid, &P->ppid);
+ else
+ fprintf(stderr, "Internal error!\n");
+
+ /* 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");
+
+ tmp = strstr(S, "Gid:");
+ if (tmp)
+ sscanf(tmp, "Gid:\t%d", &P->rgid);
+ else
+ fprintf(stderr, "Internal error!\n");
}
extern int ps_main(int argc, char **argv)
{
- proc_t p;
- DIR *dir;
- FILE *file;
- struct dirent *entry;
- char path[32], sbuf[512];
- char uidName[10]="";
- char groupName[10]="";
- int i, c;
-
- 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) {
- perror("Can't open /proc");
- exit(FALSE);
- }
-
- fprintf(stdout, "%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 ((file2str(path, sbuf, sizeof sbuf)) != -1 ) {
- parse_proc_status(sbuf, &p);
+ proc_t p;
+ DIR *dir;
+ FILE *file;
+ struct dirent *entry;
+ char path[32], sbuf[512];
+ char uidName[10] = "";
+ char groupName[10] = "";
+ int i, c;
+
+ if (argc > 1 && **(argv + 1) == '-') {
+ usage
+ ("ps\n\nReport process status\n\nThis version of ps accepts no options.\n");
}
- /* Make some adjustments as needed */
- my_getpwuid( uidName, p.ruid);
- my_getgrgid( groupName, p.rgid);
- if (*uidName == '\0')
- sprintf( uidName, "%d", p.ruid);
- if (*groupName == '\0')
- sprintf( groupName, "%d", p.rgid);
-
- 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) {
- perror(path);
- exit(FALSE);
+ dir = opendir("/proc");
+ if (!dir) {
+ perror("Can't open /proc");
+ exit(FALSE);
}
- i=0;
- while (((c = getc(file)) != EOF) && (i < 53)) {
- i++;
- if (c == '\0')
- c = ' ';
- putc(c, stdout);
+
+ fprintf(stdout, "%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 ((file2str(path, sbuf, sizeof sbuf)) != -1) {
+ parse_proc_status(sbuf, &p);
+ }
+
+ /* Make some adjustments as needed */
+ my_getpwuid(uidName, p.ruid);
+ my_getgrgid(groupName, p.rgid);
+ if (*uidName == '\0')
+ sprintf(uidName, "%d", p.ruid);
+ if (*groupName == '\0')
+ sprintf(groupName, "%d", p.rgid);
+
+ 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) {
+ perror(path);
+ exit(FALSE);
+ }
+ i = 0;
+ while (((c = getc(file)) != EOF) && (i < 53)) {
+ i++;
+ if (c == '\0')
+ c = ' ';
+ putc(c, stdout);
+ }
+ if (i == 0)
+ fprintf(stdout, "%s", p.cmd);
+ fprintf(stdout, "\n");
}
- if (i==0)
- fprintf(stdout, "%s", p.cmd);
- fprintf(stdout, "\n");
- }
- closedir(dir);
- exit(TRUE);
+ closedir(dir);
+ exit(TRUE);
}
projects / oweals / busybox.git / blobdiff