Attachment 7816 Details for Bug 39775

Test program

39775_extrausers.c (text/plain), 1.81 KB, created by Philipp Hahn on 2016-07-19 18:29 CEST

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Creator: Philipp Hahn

Created: 2016-07-19 18:29 CEST

Size: 1.81 KB

patch

obsolete

>/*
> * Create dead-lock and print debugging data.
> */
>#define _GNU_SOURCE
>#include <stdlib.h>
>#include <stdio.h>
>#include <unistd.h>
>#include <pthread.h>
>#include <grp.h>
>
>#define ARRAY_SIZE(a) ((sizeof (a)) / sizeof (*(a)))
>#define BUFLEN 4096
>#define GROUPS 100
>
>static pthread_t thread[100];
>
>static const char user[] = "Administrator";
>
>static void *run(void *data) {
>	unsigned int round;
>
>	unsigned int self = (unsigned int)(unsigned long)data;
>	pthread_t tid = pthread_self();
>
>	printf("[%d] POSIX thread ID is %u\n", self, (unsigned int)tid);
>
>	for (round = 0; round < 100; round++) {
>#if 0
>		setgrent();
>		while (1) {
>			int i;
>			char buf[BUFLEN];
>			struct group grp, *grpp;
>
>			i = getgrent_r(&grp, buf, BUFLEN, &grpp);
>			if (i)
>				break;
>			printf("%s (%d):", grpp->gr_name, grpp->gr_gid);
>			for (i = 0; ; i++) {
>				if (grpp->gr_mem[i] == NULL)
>					break;
>				printf(".");
>				// printf(" %s", grpp->gr_mem[i]);
>			}
>			printf("\n");
>		}
>		endgrent();
>#else
>		int r, ngroups = GROUPS;
>		gid_t group = 0, groups[GROUPS];
>
>		r = getgrouplist(user, group, groups, &ngroups);
>		if (r < 0 || ngroups < 0 || ngroups >= GROUPS) {
>			printf("r=%d g=%d\n", r, ngroups);
>		} else {
>			int i;
>			for (i = 0; i < ngroups; i++)
>				printf("%d ", groups[i]);
>		}
>#endif
>
>		unsigned int usecs = (round * (unsigned int)tid) % 100000;
>		usleep(usecs);
>		if (round % 10 == 0)
>			putchar('0' + (self % 10));
>	}
>
>	printf("[%d] end\n", self);
>	pthread_exit(NULL);
>}
>
>int main(int argc, char *argv[], char *envp[]) {
>	pid_t pid = getpid();
>	printf("pid=%d\n", pid);
>
>	unsigned int t;
>	for (t = 0; t < ARRAY_SIZE(thread); t++)
>		pthread_create(&thread[t], NULL, run, (void *)(long)t);
>
>	int ret = 0;
>	void *value_ptr;
>	for (t = 0; t < ARRAY_SIZE(thread); t++)
>		ret |= pthread_join(thread[t], &value_ptr);
>
>	return ret;
>}
>/* :!gcc -O0 -g -Wall -lpthread % */

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Attachments on bug 39775: 7816