95d3c4f546
Currently the update hook invoked by receive-pack has its stdin connected to the pushing client. The hook shouldn't attempt to read from this stream, and doing so may consume data that was meant for receive-pack. Instead we should give the update hook /dev/null as its stdin, ensuring that it always receives EOF and doesn't disrupt the protocol if it attempts to read any data. The post-update hook is similar, as it gets invoked with /dev/null on stdin to prevent the hook from reading data from the client. Previously we had invoked it with stdout also connected to /dev/null, throwing away anything on stdout, to prevent client protocol errors. Instead we should redirect stdout to stderr, like we do with the update hook. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
94 lines
1.8 KiB
C
94 lines
1.8 KiB
C
#include "cache.h"
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#include "run-command.h"
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#include "exec_cmd.h"
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int run_command_v_opt(const 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_STDIN) {
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int fd = open("/dev/null", O_RDWR);
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dup2(fd, 0);
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close(fd);
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}
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if (flags & RUN_COMMAND_STDOUT_TO_STDERR)
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dup2(2, 1);
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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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pid_t waiting = waitpid(pid, &status, 0);
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if (waiting < 0) {
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if (errno == EINTR)
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continue;
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error("waitpid failed (%s)", strerror(errno));
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return -ERR_RUN_COMMAND_WAITPID;
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}
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if (waiting != 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(const char **argv)
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{
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return run_command_v_opt(argv, 0);
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}
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static int run_command_va_opt(int opt, const char *cmd, va_list param)
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{
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int argc;
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const char *argv[MAX_RUN_COMMAND_ARGS];
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const char *arg;
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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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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(argv, opt);
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}
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int run_command_opt(int opt, const char *cmd, ...)
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{
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va_list params;
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int r;
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va_start(params, cmd);
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r = run_command_va_opt(opt, cmd, params);
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va_end(params);
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return r;
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}
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int run_command(const char *cmd, ...)
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{
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va_list params;
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int r;
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va_start(params, cmd);
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r = run_command_va_opt(0, cmd, params);
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va_end(params);
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return r;
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}
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