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