mirror of
https://github.com/git/git.git
synced 2024-06-02 08:16:19 +02:00
77cb17e940
The git suite may not be in PATH (and thus programs such as git-send-pack could not exec git-rev-list). Thus there is a need for logic that will locate these programs. Modifying PATH is not desirable as it result in behavior differing from the user's intentions, as we may end up prepending "/usr/bin" to PATH. - git C programs will use exec*_git_cmd() APIs to exec sub-commands. - exec*_git_cmd() will execute a git program by searching for it in the following directories: 1. --exec-path (as used by "git") 2. The GIT_EXEC_PATH environment variable. 3. $(gitexecdir) as set in Makefile (default value $(bindir)). - git wrapper will modify PATH as before to enable shell scripts to invoke "git-foo" commands. Ideally, shell scripts should use the git wrapper to become independent of PATH, and then modifying PATH will not be necessary. [jc: with minor updates after a brief review.] Signed-off-by: Michal Ostrowski <mostrows@watson.ibm.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
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, 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, 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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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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