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/*
* MIT License
*
* Copyright (c) 2020 Alessandro Mauri
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <limits.h>
#include "util.h"
/* Exit printing an error message and error string based on errno */
void die(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fputs(ANSI_COLOR_RED, stderr);
vfprintf(stderr, fmt, ap);
if (fmt[0] && fmt[strlen(fmt) - 1] == ':') {
fputc(' ', stderr);
perror(NULL);
} else {
fputc('\n', stderr);
}
fputs(ANSI_COLOR_RESET, stderr);
va_end(ap);
exit(errno ? errno : 1);
}
/* Prints the command usage flags and brief description */
void usage (void)
{
puts("Usage: automount [-h]\n"
"-h print this message\n");
}
/* If the supplied path is a link, it returns the real absolute path, else it
* returns the supplied path
*/
const char * get_path (const char *sym)
{
static char buf[PATH_MAX];
memset(buf, 0, 256);
if (!realpath(sym, buf) || *buf == '0')
return sym;
if (buf[255])
return NULL;
return buf;
}
/* Check if file exists using stat, returns 0 if file does not exist or st_mode
* if the file (or folder) exists, this way one could evaluate the type of file
* without a second stat call, on error -1 is returned and errno is set
*/
int file_exists (const char *path)
{
static struct stat st;
if (stat(path, &st) < 0) {
if (errno == ENOENT)
return 0;
else
return -1;
}
return (int)st.st_mode;
}