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| -rw-r--r-- | df.c | 93 |
1 files changed, 93 insertions, 0 deletions
@@ -0,0 +1,93 @@ +/* + * UNG's Not GNU + * + * Copyright (c) 2023, Jakob Kaivo <jkk@ung.org> + * + * 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. + */ + +#define _XOPEN_SOURCE 700 +#include <errno.h> +#include <locale.h> +#include <stdio.h> +#include <string.h> +#include <sys/types.h> +#include <sys/statvfs.h> +#include <unistd.h> + +static enum { POSIX, TOTAL } output = POSIX; +static unsigned int blocksize = 512; + +static int df(const char *path) +{ + struct statvfs fs; + if (statvfs(path, &fs) != 0) { + perror(path); + return 1; + } + + const char *name = path; + const char *root = path; + printf("%-10s %11ju %11ju %11ju %7ju%% %s\n", + name, + fs.f_blocks, + fs.f_blocks - fs.f_bfree, + fs.f_bfree, + ((fs.f_blocks - fs.f_bfree) * 100 / fs.f_blocks), + root); + return 0; +} + +int main(int argc, char *argv[]) +{ + setlocale(LC_ALL, ""); + + + int c; + while ((c = getopt(argc, argv, "kPt")) != -1) { + switch(c) { + case 'k': /** Use 1024-byte blocks **/ + blocksize = 1024; + break; + + case 'P': + output = POSIX; + break; + + case 't': + output = TOTAL; + break; + + default: + return 1; + } + } + + if (output == POSIX) { + printf("Filesystem %4u-blocks Used Available Capacity Mounted on\n", blocksize); + } else { + /* print some other header */ + } + + int ret = 0; + do { + ret |= df(argv[optind++]); + } while (optind < argc); + return ret; +} |