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This commit is contained in:
Nikita Ivanov
2022-05-23 06:32:09 +05:00
parent e0505cf094
commit 3e06cea1e4
5 changed files with 137 additions and 50 deletions
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13
utils.c
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@ -14,8 +14,11 @@ char *program;
*
* If cpid is NULL, wait for the command to finish executing;
* otherwise store pid in cpid
*
* fd is a NULL-terminated array of pairs of file descriptors
* to pass to dup2()
*/
int spawn(char *args[], pid_t *cpid, int *exitcode)
int spawn(char *args[], pid_t *cpid, int *exitcode, int *fds[2])
{
if (exitcode)
*exitcode = -1;
@ -25,6 +28,14 @@ int spawn(char *args[], pid_t *cpid, int *exitcode)
/* Child process */
if (pid == 0) {
while (*fds) {
if (dup2((*fds)[0], (*fds)[1]) == -1) {
print_errorf("dup2() failed: %s", strerror(errno));
exit(EXIT_FAILURE);
}
fds = &fds[1];
}
execvp(args[0], args);
print_errorf("exec() failed: %s", strerror(errno));
exit(EXIT_FAILURE);