121 lines
2.3 KiB
C
121 lines
2.3 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2018 K. Lange
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*
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* pidof - Find and print process IDs
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*
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*/
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#include <sys/stat.h>
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#include <sys/signal.h>
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#include <fcntl.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <signal.h>
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typedef struct process {
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int pid;
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int ppid;
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int tgid;
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char name[100];
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char path[200];
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} p_t;
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#define LINE_LEN 4096
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p_t * build_entry(struct dirent * dent) {
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char tmp[256];
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FILE * f;
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char line[LINE_LEN];
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sprintf(tmp, "/proc/%s/status", dent->d_name);
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f = fopen(tmp, "r");
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p_t * proc = malloc(sizeof(p_t));
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while (fgets(line, LINE_LEN, f) != NULL) {
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char * n = strstr(line,"\n");
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if (n) { *n = '\0'; }
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char * tab = strstr(line,"\t");
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if (tab) {
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*tab = '\0';
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tab++;
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}
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if (strstr(line, "Pid:") == line) {
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proc->pid = atoi(tab);
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} else if (strstr(line, "PPid:") == line) {
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proc->ppid = atoi(tab);
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} else if (strstr(line, "Tgid:") == line) {
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proc->tgid = atoi(tab);
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} else if (strstr(line, "Name:") == line) {
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strcpy(proc->name, tab);
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} else if (strstr(line, "Path:") == line) {
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strcpy(proc->path, tab);
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}
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}
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if (strstr(proc->name,"python") == proc->name) {
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char * name = proc->path + strlen(proc->path) - 1;
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while (1) {
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if (*name == '/') {
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name++;
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break;
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}
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if (name == proc->name) break;
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name--;
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}
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memcpy(proc->name, name, strlen(name)+1);
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}
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if (proc->tgid != proc->pid) {
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char tmp[100] = {0};
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sprintf(tmp, "{%s}", proc->name);
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memcpy(proc->name, tmp, strlen(tmp)+1);
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}
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fclose(f);
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return proc;
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}
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int main (int argc, char * argv[]) {
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if (argc < 2) return 1;
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int space = 0;
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/* Open the directory */
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DIR * dirp = opendir("/proc");
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int found_something = 0;
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struct dirent * ent = readdir(dirp);
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while (ent != NULL) {
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if (ent->d_name[0] >= '0' && ent->d_name[0] <= '9') {
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p_t * proc = build_entry(ent);
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if (!strcmp(proc->name, argv[optind])) {
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if (space++) printf(" ");
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printf("%d", proc->pid);
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found_something = 1;
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}
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}
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ent = readdir(dirp);
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}
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closedir(dirp);
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if (!found_something) {
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return 1;
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}
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printf("\n");
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return 0;
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}
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