Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "run-command.h"
   3#include "exec_cmd.h"
   4
   5int run_command_v_opt(const char **argv, int flags)
   6{
   7        pid_t pid = fork();
   8
   9        if (pid < 0)
  10                return -ERR_RUN_COMMAND_FORK;
  11        if (!pid) {
  12                if (flags & RUN_COMMAND_NO_STDIN) {
  13                        int fd = open("/dev/null", O_RDWR);
  14                        dup2(fd, 0);
  15                        close(fd);
  16                }
  17                if (flags & RUN_COMMAND_STDOUT_TO_STDERR)
  18                        dup2(2, 1);
  19                if (flags & RUN_GIT_CMD) {
  20                        execv_git_cmd(argv);
  21                } else {
  22                        execvp(argv[0], (char *const*) argv);
  23                }
  24                die("exec %s failed.", argv[0]);
  25        }
  26        for (;;) {
  27                int status, code;
  28                pid_t waiting = waitpid(pid, &status, 0);
  29
  30                if (waiting < 0) {
  31                        if (errno == EINTR)
  32                                continue;
  33                        error("waitpid failed (%s)", strerror(errno));
  34                        return -ERR_RUN_COMMAND_WAITPID;
  35                }
  36                if (waiting != pid)
  37                        return -ERR_RUN_COMMAND_WAITPID_WRONG_PID;
  38                if (WIFSIGNALED(status))
  39                        return -ERR_RUN_COMMAND_WAITPID_SIGNAL;
  40
  41                if (!WIFEXITED(status))
  42                        return -ERR_RUN_COMMAND_WAITPID_NOEXIT;
  43                code = WEXITSTATUS(status);
  44                if (code)
  45                        return -code;
  46                return 0;
  47        }
  48}
  49
  50int run_command_v(const char **argv)
  51{
  52        return run_command_v_opt(argv, 0);
  53}
  54
  55static int run_command_va_opt(int opt, const char *cmd, va_list param)
  56{
  57        int argc;
  58        const char *argv[MAX_RUN_COMMAND_ARGS];
  59        const char *arg;
  60
  61        argv[0] = (char*) cmd;
  62        argc = 1;
  63        while (argc < MAX_RUN_COMMAND_ARGS) {
  64                arg = argv[argc++] = va_arg(param, char *);
  65                if (!arg)
  66                        break;
  67        }
  68        if (MAX_RUN_COMMAND_ARGS <= argc)
  69                return error("too many args to run %s", cmd);
  70        return run_command_v_opt(argv, opt);
  71}
  72
  73int run_command_opt(int opt, const char *cmd, ...)
  74{
  75        va_list params;
  76        int r;
  77
  78        va_start(params, cmd);
  79        r = run_command_va_opt(opt, cmd, params);
  80        va_end(params);
  81        return r;
  82}
  83
  84int run_command(const char *cmd, ...)
  85{
  86        va_list params;
  87        int r;
  88
  89        va_start(params, cmd);
  90        r = run_command_va_opt(0, cmd, params);
  91        va_end(params);
  92        return r;
  93}