mirror of
https://github.com/git/git
synced 2024-08-24 18:26:02 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
When I split out the builtin commands into their own files, I left the include of <sys/ioctl.h> in git.c rather than moving it to the file that needed it (builtin-help.c). Nobody seems to have noticed, because everything still worked, but because the TIOCGWINSZ macro was now no longer defined when compiling the "term_columns()" function, it would no longer automatically notice the terminal size unless your system used the ancient "COLUMNS" environment variable approach. Trivially fixed by just moving the header include to the file that actually needs it. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
170 lines
3.6 KiB
C
170 lines
3.6 KiB
C
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <dirent.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdarg.h>
|
|
#include "git-compat-util.h"
|
|
#include "exec_cmd.h"
|
|
|
|
#include "builtin.h"
|
|
|
|
static void prepend_to_path(const char *dir, int len)
|
|
{
|
|
char *path, *old_path = getenv("PATH");
|
|
int path_len = len;
|
|
|
|
if (!old_path)
|
|
old_path = "/usr/local/bin:/usr/bin:/bin";
|
|
|
|
path_len = len + strlen(old_path) + 1;
|
|
|
|
path = malloc(path_len + 1);
|
|
|
|
memcpy(path, dir, len);
|
|
path[len] = ':';
|
|
memcpy(path + len + 1, old_path, path_len - len);
|
|
|
|
setenv("PATH", path, 1);
|
|
}
|
|
|
|
const char git_version_string[] = GIT_VERSION;
|
|
|
|
static void handle_internal_command(int argc, const char **argv, char **envp)
|
|
{
|
|
const char *cmd = argv[0];
|
|
static struct cmd_struct {
|
|
const char *cmd;
|
|
int (*fn)(int, const char **, char **);
|
|
} commands[] = {
|
|
{ "version", cmd_version },
|
|
{ "help", cmd_help },
|
|
{ "log", cmd_log },
|
|
{ "whatchanged", cmd_whatchanged },
|
|
{ "show", cmd_show },
|
|
};
|
|
int i;
|
|
|
|
/* Turn "git cmd --help" into "git help cmd" */
|
|
if (argc > 1 && !strcmp(argv[1], "--help")) {
|
|
argv[1] = argv[0];
|
|
argv[0] = cmd = "help";
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(commands); i++) {
|
|
struct cmd_struct *p = commands+i;
|
|
if (strcmp(p->cmd, cmd))
|
|
continue;
|
|
exit(p->fn(argc, argv, envp));
|
|
}
|
|
}
|
|
|
|
int main(int argc, const char **argv, char **envp)
|
|
{
|
|
const char *cmd = argv[0];
|
|
char *slash = strrchr(cmd, '/');
|
|
char git_command[PATH_MAX + 1];
|
|
const char *exec_path = NULL;
|
|
|
|
/*
|
|
* Take the basename of argv[0] as the command
|
|
* name, and the dirname as the default exec_path
|
|
* if it's an absolute path and we don't have
|
|
* anything better.
|
|
*/
|
|
if (slash) {
|
|
*slash++ = 0;
|
|
if (*cmd == '/')
|
|
exec_path = cmd;
|
|
cmd = slash;
|
|
}
|
|
|
|
/*
|
|
* "git-xxxx" is the same as "git xxxx", but we obviously:
|
|
*
|
|
* - cannot take flags in between the "git" and the "xxxx".
|
|
* - cannot execute it externally (since it would just do
|
|
* the same thing over again)
|
|
*
|
|
* So we just directly call the internal command handler, and
|
|
* die if that one cannot handle it.
|
|
*/
|
|
if (!strncmp(cmd, "git-", 4)) {
|
|
cmd += 4;
|
|
argv[0] = cmd;
|
|
handle_internal_command(argc, argv, envp);
|
|
die("cannot handle %s internally", cmd);
|
|
}
|
|
|
|
/* Default command: "help" */
|
|
cmd = "help";
|
|
|
|
/* Look for flags.. */
|
|
while (argc > 1) {
|
|
cmd = *++argv;
|
|
argc--;
|
|
|
|
if (strncmp(cmd, "--", 2))
|
|
break;
|
|
|
|
cmd += 2;
|
|
|
|
/*
|
|
* For legacy reasons, the "version" and "help"
|
|
* commands can be written with "--" prepended
|
|
* to make them look like flags.
|
|
*/
|
|
if (!strcmp(cmd, "help"))
|
|
break;
|
|
if (!strcmp(cmd, "version"))
|
|
break;
|
|
|
|
/*
|
|
* Check remaining flags (which by now must be
|
|
* "--exec-path", but maybe we will accept
|
|
* other arguments some day)
|
|
*/
|
|
if (!strncmp(cmd, "exec-path", 9)) {
|
|
cmd += 9;
|
|
if (*cmd == '=') {
|
|
git_set_exec_path(cmd + 1);
|
|
continue;
|
|
}
|
|
puts(git_exec_path());
|
|
exit(0);
|
|
}
|
|
cmd_usage(0, NULL, NULL);
|
|
}
|
|
argv[0] = cmd;
|
|
|
|
/*
|
|
* We search for git commands in the following order:
|
|
* - git_exec_path()
|
|
* - the path of the "git" command if we could find it
|
|
* in $0
|
|
* - the regular PATH.
|
|
*/
|
|
if (exec_path)
|
|
prepend_to_path(exec_path, strlen(exec_path));
|
|
exec_path = git_exec_path();
|
|
prepend_to_path(exec_path, strlen(exec_path));
|
|
|
|
/* See if it's an internal command */
|
|
handle_internal_command(argc, argv, envp);
|
|
|
|
/* .. then try the external ones */
|
|
execv_git_cmd(argv);
|
|
|
|
if (errno == ENOENT)
|
|
cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
|
|
|
|
fprintf(stderr, "Failed to run command '%s': %s\n",
|
|
git_command, strerror(errno));
|
|
|
|
return 1;
|
|
}
|