summaryrefslogtreecommitdiff
path: root/run-command.c
diff options
context:
space:
mode:
Diffstat (limited to 'run-command.c')
-rw-r--r--run-command.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/run-command.c b/run-command.c
new file mode 100644
index 0000000000..cfbad74d14
--- /dev/null
+++ b/run-command.c
@@ -0,0 +1,93 @@
+#include "cache.h"
+#include "run-command.h"
+#include "exec_cmd.h"
+
+int run_command_v_opt(const char **argv, int flags)
+{
+ pid_t pid = fork();
+
+ if (pid < 0)
+ return -ERR_RUN_COMMAND_FORK;
+ if (!pid) {
+ if (flags & RUN_COMMAND_NO_STDIN) {
+ int fd = open("/dev/null", O_RDWR);
+ dup2(fd, 0);
+ close(fd);
+ }
+ if (flags & RUN_COMMAND_STDOUT_TO_STDERR)
+ dup2(2, 1);
+ if (flags & RUN_GIT_CMD) {
+ execv_git_cmd(argv);
+ } else {
+ execvp(argv[0], (char *const*) argv);
+ }
+ die("exec %s failed.", argv[0]);
+ }
+ for (;;) {
+ int status, code;
+ pid_t waiting = waitpid(pid, &status, 0);
+
+ if (waiting < 0) {
+ if (errno == EINTR)
+ continue;
+ error("waitpid failed (%s)", strerror(errno));
+ return -ERR_RUN_COMMAND_WAITPID;
+ }
+ if (waiting != pid)
+ return -ERR_RUN_COMMAND_WAITPID_WRONG_PID;
+ if (WIFSIGNALED(status))
+ return -ERR_RUN_COMMAND_WAITPID_SIGNAL;
+
+ if (!WIFEXITED(status))
+ return -ERR_RUN_COMMAND_WAITPID_NOEXIT;
+ code = WEXITSTATUS(status);
+ if (code)
+ return -code;
+ return 0;
+ }
+}
+
+int run_command_v(const char **argv)
+{
+ return run_command_v_opt(argv, 0);
+}
+
+static int run_command_va_opt(int opt, const char *cmd, va_list param)
+{
+ int argc;
+ const char *argv[MAX_RUN_COMMAND_ARGS];
+ const char *arg;
+
+ argv[0] = (char*) cmd;
+ argc = 1;
+ while (argc < MAX_RUN_COMMAND_ARGS) {
+ arg = argv[argc++] = va_arg(param, char *);
+ if (!arg)
+ break;
+ }
+ if (MAX_RUN_COMMAND_ARGS <= argc)
+ return error("too many args to run %s", cmd);
+ return run_command_v_opt(argv, opt);
+}
+
+int run_command_opt(int opt, const char *cmd, ...)
+{
+ va_list params;
+ int r;
+
+ va_start(params, cmd);
+ r = run_command_va_opt(opt, cmd, params);
+ va_end(params);
+ return r;
+}
+
+int run_command(const char *cmd, ...)
+{
+ va_list params;
+ int r;
+
+ va_start(params, cmd);
+ r = run_command_va_opt(0, cmd, params);
+ va_end(params);
+ return r;
+}