libite
2.6.1
src
systemf.c
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/* Formatted system() which returns actual return status of command
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*
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* Copyright (c) 2021 Joachim Wiberg <troglobit@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/wait.h>
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int
systemf
(
const
char
*fmt, ...)
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{
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va_list ap;
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char
*cmd;
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int
len;
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int
rc;
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va_start(ap, fmt);
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len = vsnprintf(NULL, 0, fmt, ap);
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va_end(ap);
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cmd = alloca(++len);
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if
(!cmd) {
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errno = ENOMEM;
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return
-1;
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}
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va_start(ap, fmt);
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vsnprintf(cmd, len, fmt, ap);
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va_end(ap);
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rc = system(cmd);
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if
(rc == -1)
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return
-1;
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if
(WIFEXITED(rc)) {
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errno = 0;
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rc = WEXITSTATUS(rc);
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}
else
if
(WIFSIGNALED(rc)) {
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errno = EINTR;
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rc = -1;
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}
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return
rc;
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}
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systemf
int systemf(const char *fmt,...)
Definition
systemf.c:44
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