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f1000898d4
There are a number of places where we do some variation of fork()+exec() but we also need to setup redirection in the process, much like what run_command does for us already with its option flags. It would be nice to reuse more of the run_command logic, especially as that non-fork API helps us to port to odd platforms like Win32. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
#include "cache.h"
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#include "run-command.h"
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#include "exec_cmd.h"
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int run_command(struct child_process *cmd)
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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 (cmd->no_stdin) {
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int fd = open("/dev/null", O_RDWR);
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dup2(fd, 0);
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close(fd);
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}
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if (cmd->stdout_to_stderr)
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dup2(2, 1);
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if (cmd->git_cmd) {
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execv_git_cmd(cmd->argv);
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} else {
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execvp(cmd->argv[0], (char *const*) cmd->argv);
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}
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die("exec %s failed.", cmd->argv[0]);
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}
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for (;;) {
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int status, code;
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pid_t waiting = waitpid(pid, &status, 0);
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if (waiting < 0) {
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if (errno == EINTR)
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continue;
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error("waitpid failed (%s)", strerror(errno));
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return -ERR_RUN_COMMAND_WAITPID;
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}
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if (waiting != 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_opt(const char **argv, int opt)
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{
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struct child_process cmd;
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memset(&cmd, 0, sizeof(cmd));
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cmd.argv = argv;
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cmd.no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
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cmd.git_cmd = opt & RUN_GIT_CMD ? 1 : 0;
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cmd.stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
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return run_command(&cmd);
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}
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