7550be0a2b
Currently, execv_git_cmd() always try running the dashed form, which means we cannot easily remove the git-foo hardlinks for built-in commands. This updates the function to always exec "git foo" form, and makes sure "git" potty does not infinitely recurse to itself. Signed-off-by: Junio C Hamano <gitster@pobox.com>
113 lines
2.1 KiB
C
113 lines
2.1 KiB
C
#include "cache.h"
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#include "exec_cmd.h"
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#include "quote.h"
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#define MAX_ARGS 32
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extern char **environ;
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static const char *builtin_exec_path = GIT_EXEC_PATH;
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static const char *argv_exec_path;
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void git_set_argv_exec_path(const char *exec_path)
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{
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argv_exec_path = exec_path;
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}
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/* Returns the highest-priority, location to look for git programs. */
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const char *git_exec_path(void)
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{
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const char *env;
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if (argv_exec_path)
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return argv_exec_path;
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env = getenv(EXEC_PATH_ENVIRONMENT);
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if (env && *env) {
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return env;
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}
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return builtin_exec_path;
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}
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static void add_path(struct strbuf *out, const char *path)
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{
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if (path && *path) {
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if (is_absolute_path(path))
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strbuf_addstr(out, path);
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else
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strbuf_addstr(out, make_absolute_path(path));
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strbuf_addch(out, ':');
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}
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}
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void setup_path(const char *cmd_path)
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{
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const char *old_path = getenv("PATH");
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struct strbuf new_path;
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strbuf_init(&new_path, 0);
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add_path(&new_path, argv_exec_path);
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add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT));
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add_path(&new_path, builtin_exec_path);
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add_path(&new_path, cmd_path);
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if (old_path)
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strbuf_addstr(&new_path, old_path);
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else
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strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin");
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setenv("PATH", new_path.buf, 1);
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strbuf_release(&new_path);
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}
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int execv_git_cmd(const char **argv)
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{
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int argc;
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const char **nargv;
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for (argc = 0; argv[argc]; argc++)
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; /* just counting */
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nargv = xmalloc(sizeof(*nargv) * (argc + 2));
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nargv[0] = "git";
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for (argc = 0; argv[argc]; argc++)
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nargv[argc + 1] = argv[argc];
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nargv[argc + 1] = NULL;
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trace_argv_printf(nargv, "trace: exec:");
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/* execvp() can only ever return if it fails */
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execvp("git", (char **)nargv);
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trace_printf("trace: exec failed: %s\n", strerror(errno));
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free(nargv);
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return -1;
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}
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int execl_git_cmd(const char *cmd,...)
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{
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int argc;
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const char *argv[MAX_ARGS + 1];
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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] = cmd;
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argc = 1;
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while (argc < MAX_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_ARGS <= argc)
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return error("too many args to run %s", cmd);
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argv[argc] = NULL;
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return execv_git_cmd(argv);
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}
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