Make send-pack --all and explicit ref mutually exclusive.
[git/git.git] / run-command.c
CommitLineData
b1bf95bb
JW
1#include "cache.h"
2#include "run-command.h"
3#include <sys/wait.h>
4
5static int run_external_command(int argc, const char **argv)
6{
7 pid_t pid = fork();
8
9 if (pid < 0)
10 return -ERR_RUN_COMMAND_FORK;
11 if (!pid) {
12 execvp(argv[0], (char *const*) argv);
13 return -ERR_RUN_COMMAND_EXEC;
14 }
15 for (;;) {
16 int status, code;
17 int retval = waitpid(pid, &status, 0);
18
19 if (retval < 0) {
20 if (errno == EINTR)
21 continue;
22 error("waitpid failed (%s)", strerror(retval));
23 return -ERR_RUN_COMMAND_WAITPID;
24 }
25 if (retval != pid)
26 return -ERR_RUN_COMMAND_WAITPID_WRONG_PID;
27 if (WIFSIGNALED(status))
28 return -ERR_RUN_COMMAND_WAITPID_SIGNAL;
29
30 if (!WIFEXITED(status))
31 return -ERR_RUN_COMMAND_WAITPID_NOEXIT;
32 code = WEXITSTATUS(status);
33 if (code)
34 return -code;
35 return 0;
36 }
37}
38
39int run_command(const char *cmd, ...)
40{
41 int argc;
42 const char *argv[MAX_RUN_COMMAND_ARGS];
43 const char *arg;
44 va_list param;
45
46 fprintf(stderr, "run-command %s (%d)\n", cmd, ERR_RUN_COMMAND_EXEC);
47
48 va_start(param, cmd);
49 argv[0] = cmd;
50 argc = 1;
51 while (argc < MAX_RUN_COMMAND_ARGS) {
52 arg = argv[argc++] = va_arg(param, char *);
53 if (!arg)
54 break;
55 }
56 va_end(param);
57 if (MAX_RUN_COMMAND_ARGS <= argc)
58 return error("too many args to run %s", cmd);
59 return run_external_command(argc, argv);
60}