96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/* pid -- display the process id of a running command
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Copyright (c) 1994 Salvatore Valente <svalente@mit.edu>
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Copyright (c) 1996 Bruno Haible <haible@ilog.fr>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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extern int* get_pids (char*, int);
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char version_string[] = "pid 1.0";
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char* program_name;
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int usage (int status)
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{
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FILE* fp = (status == 0 ? stdout : stderr);
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fprintf(fp, "Usage: %s command ...\n", program_name);
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return status;
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}
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static int compar_int (const void* i1, const void* i2)
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{
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return *((int *)i1) - *((int *)i2);
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}
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int main (int argc, char *argv[])
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{
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int i;
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int *pids, *pids0;
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int num_allpids = 0;
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int *allpids = (int*)0;
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int allpids_size = 0;
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program_name = argv[0];
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/* Argument processing. */
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for (i = 1; i < argc; i++) {
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char* arg = argv[i];
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if (!strcmp(arg, "--help"))
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return usage(0);
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else if (!strcmp(arg, "--version")) {
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printf("%s\n", version_string);
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return 0;
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}
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}
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/* Gather the pids. */
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for (i = 1; i < argc; i++) {
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char* arg = argv[i];
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pids0 = pids = get_pids(arg, 1);
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if (pids) {
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while (*pids >= 0) {
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int pid = *pids++;
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if (num_allpids >= allpids_size) {
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allpids_size = 2*allpids_size+1;
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allpids = (int*) realloc(allpids, sizeof(int)*allpids_size);
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if (!allpids) {
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fprintf(stderr, "%s: out of memory\n", program_name);
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exit(1);
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}
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}
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allpids[num_allpids++] = pid;
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}
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free(pids0);
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}
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}
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/* Sort them. */
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if (num_allpids > 1)
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qsort(allpids, num_allpids, sizeof(int), compar_int);
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/* Print them. */
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for (pids = allpids, i = num_allpids; i > 0; pids++, i--)
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printf("%d\n", *pids);
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return 0;
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}
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