75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
#include "cache.h"
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#include "run-command.h"
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#include <sys/wait.h>
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#include "exec_cmd.h"
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int run_command_v_opt(int argc, const char **argv, int flags)
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{
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pid_t pid = fork();
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if (pid < 0)
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return -ERR_RUN_COMMAND_FORK;
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if (!pid) {
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if (flags & RUN_COMMAND_NO_STDIO) {
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int fd = open("/dev/null", O_RDWR);
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dup2(fd, 0);
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dup2(fd, 1);
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close(fd);
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}
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if (flags & RUN_GIT_CMD) {
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execv_git_cmd(argv);
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} else {
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execvp(argv[0], (char *const*) argv);
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}
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die("exec %s failed.", argv[0]);
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}
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for (;;) {
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int status, code;
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int retval = waitpid(pid, &status, 0);
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if (retval < 0) {
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if (errno == EINTR)
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continue;
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error("waitpid failed (%s)", strerror(retval));
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return -ERR_RUN_COMMAND_WAITPID;
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}
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if (retval != pid)
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return -ERR_RUN_COMMAND_WAITPID_WRONG_PID;
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if (WIFSIGNALED(status))
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return -ERR_RUN_COMMAND_WAITPID_SIGNAL;
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if (!WIFEXITED(status))
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return -ERR_RUN_COMMAND_WAITPID_NOEXIT;
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code = WEXITSTATUS(status);
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if (code)
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return -code;
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return 0;
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}
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}
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int run_command_v(int argc, const char **argv)
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{
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return run_command_v_opt(argc, argv, 0);
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}
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int run_command(const char *cmd, ...)
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{
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int argc;
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const char *argv[MAX_RUN_COMMAND_ARGS];
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const char *arg;
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va_list param;
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va_start(param, cmd);
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argv[0] = (char*) cmd;
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argc = 1;
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while (argc < MAX_RUN_COMMAND_ARGS) {
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arg = argv[argc++] = va_arg(param, char *);
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if (!arg)
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break;
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}
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va_end(param);
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if (MAX_RUN_COMMAND_ARGS <= argc)
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return error("too many args to run %s", cmd);
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return run_command_v_opt(argc, argv, 0);
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}
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