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Diffstat (limited to 'package/toolbox/src/src/ps.c')
| -rw-r--r-- | package/toolbox/src/src/ps.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/package/toolbox/src/src/ps.c b/package/toolbox/src/src/ps.c new file mode 100644 index 000000000..07fe5c94b --- /dev/null +++ b/package/toolbox/src/src/ps.c @@ -0,0 +1,244 @@ +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> +#include <fcntl.h> +#include <unistd.h> + +#include <string.h> + +#include <sys/stat.h> +#include <sys/types.h> +#include <dirent.h> + +#include <pwd.h> + +static char *nexttoksep(char **strp, char *sep) +{ + char *p = strsep(strp,sep); + return (p == 0) ? "" : p; +} +static char *nexttok(char **strp) +{ + return nexttoksep(strp, " "); +} + +#define SHOW_PRIO 1 +#define SHOW_TIME 2 +#define SHOW_CPU 8 +#define SHOW_MACLABEL 16 + +static int display_flags = 0; + +static int ps_line(int pid, int tid, char *namefilter) +{ + char statline[1024]; + char cmdline[1024]; + char macline[1024]; + char user[32]; + struct stat stats; + int fd, r; + char *ptr, *name, *state; + int ppid; + unsigned wchan, rss, vss, eip; + unsigned utime, stime; + int prio, nice, rtprio, sched, psr; + struct passwd *pw; + + sprintf(statline, "/proc/%d", pid); + stat(statline, &stats); + + if(tid) { + sprintf(statline, "/proc/%d/task/%d/stat", pid, tid); + cmdline[0] = 0; + snprintf(macline, sizeof(macline), "/proc/%d/task/%d/attr/current", pid, tid); + } else { + sprintf(statline, "/proc/%d/stat", pid); + sprintf(cmdline, "/proc/%d/cmdline", pid); + snprintf(macline, sizeof(macline), "/proc/%d/attr/current", pid); + fd = open(cmdline, O_RDONLY); + if(fd == 0) { + r = 0; + } else { + r = read(fd, cmdline, 1023); + close(fd); + if(r < 0) r = 0; + } + cmdline[r] = 0; + } + + fd = open(statline, O_RDONLY); + if(fd == 0) return -1; + r = read(fd, statline, 1023); + close(fd); + if(r < 0) return -1; + statline[r] = 0; + + ptr = statline; + nexttok(&ptr); // skip pid + ptr++; // skip "(" + + name = ptr; + ptr = strrchr(ptr, ')'); // Skip to *last* occurence of ')', + *ptr++ = '\0'; // and null-terminate name. + + ptr++; // skip " " + state = nexttok(&ptr); + ppid = atoi(nexttok(&ptr)); + nexttok(&ptr); // pgrp + nexttok(&ptr); // sid + nexttok(&ptr); // tty + + nexttok(&ptr); // tpgid + nexttok(&ptr); // flags + nexttok(&ptr); // minflt + nexttok(&ptr); // cminflt + nexttok(&ptr); // majflt + nexttok(&ptr); // cmajflt +#if 1 + utime = atoi(nexttok(&ptr)); + stime = atoi(nexttok(&ptr)); +#else + nexttok(&ptr); // utime + nexttok(&ptr); // stime +#endif + nexttok(&ptr); // cutime + nexttok(&ptr); // cstime + prio = atoi(nexttok(&ptr)); + nice = atoi(nexttok(&ptr)); + nexttok(&ptr); // threads + nexttok(&ptr); // itrealvalue + nexttok(&ptr); // starttime + vss = strtoul(nexttok(&ptr), 0, 10); // vsize + rss = strtoul(nexttok(&ptr), 0, 10); // rss + nexttok(&ptr); // rlim + nexttok(&ptr); // startcode + nexttok(&ptr); // endcode + nexttok(&ptr); // startstack + nexttok(&ptr); // kstkesp + eip = strtoul(nexttok(&ptr), 0, 10); // kstkeip + nexttok(&ptr); // signal + nexttok(&ptr); // blocked + nexttok(&ptr); // sigignore + nexttok(&ptr); // sigcatch + wchan = strtoul(nexttok(&ptr), 0, 10); // wchan + nexttok(&ptr); // nswap + nexttok(&ptr); // cnswap + nexttok(&ptr); // exit signal + psr = atoi(nexttok(&ptr)); // processor + rtprio = atoi(nexttok(&ptr)); // rt_priority + sched = atoi(nexttok(&ptr)); // scheduling policy + + nexttok(&ptr); // tty + + if(tid != 0) { + ppid = pid; + pid = tid; + } + + pw = getpwuid(stats.st_uid); + if(pw == 0) { + sprintf(user,"%d",(int)stats.st_uid); + } else { + strcpy(user,pw->pw_name); + } + + if(!namefilter || !strncmp(name, namefilter, strlen(namefilter))) { + if (display_flags & SHOW_MACLABEL) { + fd = open(macline, O_RDONLY); + strcpy(macline, "-"); + if (fd >= 0) { + r = read(fd, macline, sizeof(macline)-1); + close(fd); + if (r > 0) + macline[r] = 0; + } + printf("%-30s %-9s %-5d %-5d %s\n", macline, user, pid, ppid, cmdline[0] ? cmdline : name); + return 0; + } + + printf("%-9s %-5d %-5d %-6d %-5d", user, pid, ppid, vss / 1024, rss * 4); + if (display_flags & SHOW_CPU) + printf(" %-2d", psr); + if (display_flags & SHOW_PRIO) + printf(" %-5d %-5d %-5d %-5d", prio, nice, rtprio, sched); + printf(" %08x %08x %s %s", wchan, eip, state, cmdline[0] ? cmdline : name); + if(display_flags&SHOW_TIME) + printf(" (u:%d, s:%d)", utime, stime); + + printf("\n"); + } + return 0; +} + + +void ps_threads(int pid, char *namefilter) +{ + char tmp[128]; + DIR *d; + struct dirent *de; + + sprintf(tmp,"/proc/%d/task",pid); + d = opendir(tmp); + if(d == 0) return; + + while((de = readdir(d)) != 0){ + if(isdigit(de->d_name[0])){ + int tid = atoi(de->d_name); + if(tid == pid) continue; + ps_line(pid, tid, namefilter); + } + } + closedir(d); +} + +int main(int argc, char **argv) +{ + DIR *d; + struct dirent *de; + char *namefilter = 0; + int pidfilter = 0; + int threads = 0; + + d = opendir("/proc"); + if(d == 0) return -1; + + while(argc > 1){ + if(!strcmp(argv[1],"-t")) { + threads = 1; + } else if(!strcmp(argv[1],"-x")) { + display_flags |= SHOW_TIME; + } else if(!strcmp(argv[1], "-Z")) { + display_flags |= SHOW_MACLABEL; + } else if(!strcmp(argv[1],"-p")) { + display_flags |= SHOW_PRIO; + } else if(!strcmp(argv[1],"-c")) { + display_flags |= SHOW_CPU; + } else if(isdigit(argv[1][0])){ + pidfilter = atoi(argv[1]); + } else { + namefilter = argv[1]; + } + argc--; + argv++; + } + + if (display_flags & SHOW_MACLABEL) { + printf("LABEL USER PID PPID NAME\n"); + } else { + printf("USER PID PPID VSIZE RSS %s%s WCHAN PC NAME\n", + (display_flags&SHOW_CPU)?"CPU ":"", + (display_flags&SHOW_PRIO)?"PRIO NICE RTPRI SCHED ":""); + } + while((de = readdir(d)) != 0){ + if(isdigit(de->d_name[0])){ + int pid = atoi(de->d_name); + if(!pidfilter || (pidfilter == pid)) { + ps_line(pid, 0, namefilter); + if(threads) ps_threads(pid, namefilter); + } + } + } + closedir(d); + return 0; +} + |