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/*
* Use set/get/endpwent calls from two processes to iterate over the
* password database. This checks the multithreaded stuff works.
*/
#include <stdio.h>
#include <pwd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <wait.h>
void dump_pwent(char *id)
{
struct passwd *pw;
char fname[255];
FILE *fptr;
/* Open results file */
sprintf(fname, "/tmp/getpwent_r-%s.out-%d", id, getpid());
if ((fptr = fopen(fname, "w")) == 0) {
fprintf(stderr, "ERROR: could not open file %s: %s\n", fname,
sys_errlist[errno]);
return;
}
/* Dump passwd database */
setpwent();
while((pw = getpwent()) != NULL) {
fprintf(fptr,"%s:%s:%s:%d:%d\n", pw->pw_name, pw->pw_passwd,
pw->pw_gecos, pw->pw_uid, pw->pw_gid);
}
endpwent();
/* Close results file */
fclose(fptr);
}
#define NUM_FORKS 2
int main(int argc, char **argv)
{
pid_t pids[NUM_FORKS];
int i, status;
/* Check args */
if (argc != 2) {
printf("ERROR: must specify output file identifier\n");
return 1;
}
for(i = 0; i < NUM_FORKS; i++) {
/* Fork off lots */
if ((pids[i] = fork()) == -1) {
perror("fork");
return 1;
}
/* Child does tests */
if (pids[i] == 0) {
dump_pwent(argv[1]);
return 0;
}
}
/* Wait for everyone to finish */
for (i = 0; i < NUM_FORKS; i++) {
waitpid(pids[i], &status, 0);
}
printf("PASS: getpwent_r.c\n");
return 0;
}
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