Merge branch 'js/exec-error-report'

[git.git] / run-command.c

diff --git a/run-command.c b/run-command.c
index efe9fe413887966ced2bb3cd976789ec8789ec4d..2feb493951322617692085998ac8507cdba9dd30 100644 (file)
--- a/run-command.c
+++ b/run-command.c
@@ -8,12 +8,58 @@ static inline void close_pair(int fd[2])
        close(fd[1]);
 }
 
+#ifndef WIN32
 static inline void dup_devnull(int to)
 {
        int fd = open("/dev/null", O_RDWR);
        dup2(fd, to);
        close(fd);
 }
+#endif
+
+static const char **prepare_shell_cmd(const char **argv)
+{
+       int argc, nargc = 0;
+       const char **nargv;
+
+       for (argc = 0; argv[argc]; argc++)
+               ; /* just counting */
+       /* +1 for NULL, +3 for "sh -c" plus extra $0 */
+       nargv = xmalloc(sizeof(*nargv) * (argc + 1 + 3));
+
+       if (argc < 1)
+               die("BUG: shell command is empty");
+
+       if (strcspn(argv[0], "|&;<>()$`\\\"' \t\n*?[#~=%") != strlen(argv[0])) {
+               nargv[nargc++] = "sh";
+               nargv[nargc++] = "-c";
+
+               if (argc < 2)
+                       nargv[nargc++] = argv[0];
+               else {
+                       struct strbuf arg0 = STRBUF_INIT;
+                       strbuf_addf(&arg0, "%s \"$@\"", argv[0]);
+                       nargv[nargc++] = strbuf_detach(&arg0, NULL);
+               }
+       }
+
+       for (argc = 0; argv[argc]; argc++)
+               nargv[nargc++] = argv[argc];
+       nargv[nargc] = NULL;
+
+       return nargv;
+}
+
+#ifndef WIN32
+static int execv_shell_cmd(const char **argv)
+{
+       const char **nargv = prepare_shell_cmd(argv);
+       trace_argv_printf(nargv, "trace: exec:");
+       execvp(nargv[0], (char **)nargv);
+       free(nargv);
+       return -1;
+}
+#endif
 
 #ifndef WIN32
 static int child_err = 2;
@@ -224,6 +270,8 @@ fail_pipe:
                }
                if (cmd->git_cmd) {
                        execv_git_cmd(cmd->argv);
+               } else if (cmd->use_shell) {
+                       execv_shell_cmd(cmd->argv);
                } else {
                        execvp(cmd->argv[0], (char *const*) cmd->argv);
                }
@@ -262,42 +310,30 @@ fail_pipe:
 }
 #else
 {
-       int s0 = -1, s1 = -1, s2 = -1;  /* backups of stdin, stdout, stderr */
+       int fhin = 0, fhout = 1, fherr = 2;
        const char **sargv = cmd->argv;
        char **env = environ;
 
-       if (cmd->no_stdin) {
-               s0 = dup(0);
-               dup_devnull(0);
-       } else if (need_in) {
-               s0 = dup(0);
-               dup2(fdin[0], 0);
-       } else if (cmd->in) {
-               s0 = dup(0);
-               dup2(cmd->in, 0);
-       }
-
-       if (cmd->no_stderr) {
-               s2 = dup(2);
-               dup_devnull(2);
-       } else if (need_err) {
-               s2 = dup(2);
-               dup2(fderr[1], 2);
-       }
-
-       if (cmd->no_stdout) {
-               s1 = dup(1);
-               dup_devnull(1);
-       } else if (cmd->stdout_to_stderr) {
-               s1 = dup(1);
-               dup2(2, 1);
-       } else if (need_out) {
-               s1 = dup(1);
-               dup2(fdout[1], 1);
-       } else if (cmd->out > 1) {
-               s1 = dup(1);
-               dup2(cmd->out, 1);
-       }
+       if (cmd->no_stdin)
+               fhin = open("/dev/null", O_RDWR);
+       else if (need_in)
+               fhin = dup(fdin[0]);
+       else if (cmd->in)
+               fhin = dup(cmd->in);
+
+       if (cmd->no_stderr)
+               fherr = open("/dev/null", O_RDWR);
+       else if (need_err)
+               fherr = dup(fderr[1]);
+
+       if (cmd->no_stdout)
+               fhout = open("/dev/null", O_RDWR);
+       else if (cmd->stdout_to_stderr)
+               fhout = dup(fherr);
+       else if (need_out)
+               fhout = dup(fdout[1]);
+       else if (cmd->out > 1)
+               fhout = dup(cmd->out);
 
        if (cmd->dir)
                die("chdir in start_command() not implemented");
@@ -306,9 +342,12 @@ fail_pipe:
 
        if (cmd->git_cmd) {
                cmd->argv = prepare_git_cmd(cmd->argv);
+       } else if (cmd->use_shell) {
+               cmd->argv = prepare_shell_cmd(cmd->argv);
        }
 
-       cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env);
+       cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env,
+                                 fhin, fhout, fherr);
        failed_errno = errno;
        if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT))
                error("cannot spawn %s: %s", cmd->argv[0], strerror(errno));
@@ -319,12 +358,12 @@ fail_pipe:
                free(cmd->argv);
 
        cmd->argv = sargv;
-       if (s0 >= 0)
-               dup2(s0, 0), close(s0);
-       if (s1 >= 0)
-               dup2(s1, 1), close(s1);
-       if (s2 >= 0)
-               dup2(s2, 2), close(s2);
+       if (fhin != 0)
+               close(fhin);
+       if (fhout != 1)
+               close(fhout);
+       if (fherr != 2)
+               close(fherr);
 }
 #endif
 
@@ -382,6 +421,7 @@ static void prepare_run_command_v_opt(struct child_process *cmd,
        cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0;
        cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
        cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0;
+       cmd->use_shell = opt & RUN_USING_SHELL ? 1 : 0;
 }
 
 int run_command_v_opt(const char **argv, int opt)