diff options
Diffstat (limited to 'run-command.c')
-rw-r--r-- | run-command.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/run-command.c b/run-command.c new file mode 100644 index 0000000000..ca67ee9333 --- /dev/null +++ b/run-command.c @@ -0,0 +1,74 @@ +#include "cache.h" +#include "run-command.h" +#include <sys/wait.h> +#include "exec_cmd.h" + +int run_command_v_opt(int argc, const char **argv, int flags) +{ + pid_t pid = fork(); + + if (pid < 0) + return -ERR_RUN_COMMAND_FORK; + if (!pid) { + if (flags & RUN_COMMAND_NO_STDIO) { + int fd = open("/dev/null", O_RDWR); + dup2(fd, 0); + dup2(fd, 1); + close(fd); + } + 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; + int retval = waitpid(pid, &status, 0); + + if (retval < 0) { + if (errno == EINTR) + continue; + error("waitpid failed (%s)", strerror(retval)); + return -ERR_RUN_COMMAND_WAITPID; + } + if (retval != 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(int argc, const char **argv) +{ + return run_command_v_opt(argc, argv, 0); +} + +int run_command(const char *cmd, ...) +{ + int argc; + const char *argv[MAX_RUN_COMMAND_ARGS]; + const char *arg; + va_list param; + + va_start(param, cmd); + argv[0] = (char*) cmd; + argc = 1; + while (argc < MAX_RUN_COMMAND_ARGS) { + arg = argv[argc++] = va_arg(param, char *); + if (!arg) + break; + } + va_end(param); + if (MAX_RUN_COMMAND_ARGS <= argc) + return error("too many args to run %s", cmd); + return run_command_v_opt(argc, argv, 0); +} |