diff options
| -rw-r--r-- | run-command.c | 16 | ||||
| -rw-r--r-- | run-command.h | 13 |
2 files changed, 29 insertions, 0 deletions
diff --git a/run-command.c b/run-command.c index 0b432cc..65ecbe3 100644 --- a/run-command.c +++ b/run-command.c @@ -833,3 +833,19 @@ int run_hook_le(const char *const *env, const char *name, ...) return ret; } + +int capture_command(struct child_process *cmd, struct strbuf *buf, size_t hint) +{ + cmd->out = -1; + if (start_command(cmd) < 0) + return -1; + + if (strbuf_read(buf, cmd->out, hint) < 0) { + close(cmd->out); + finish_command(cmd); /* throw away exit code */ + return -1; + } + + close(cmd->out); + return finish_command(cmd); +} diff --git a/run-command.h b/run-command.h index d6868dc..263b966 100644 --- a/run-command.h +++ b/run-command.h @@ -71,6 +71,19 @@ int run_command_v_opt(const char **argv, int opt); */ int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env); +/** + * Execute the given command, capturing its stdout in the given strbuf. + * Returns -1 if starting the command fails or reading fails, and otherwise + * returns the exit code of the command. The output collected in the + * buffer is kept even if the command returns a non-zero exit. The hint field + * gives a starting size for the strbuf allocation. + * + * The fields of "cmd" should be set up as they would for a normal run_command + * invocation. But note that there is no need to set cmd->out; the function + * sets it up for the caller. + */ +int capture_command(struct child_process *cmd, struct strbuf *buf, size_t hint); + /* * The purpose of the following functions is to feed a pipe by running * a function asynchronously and providing output that the caller reads. |