94 lines
1.7 KiB
C
94 lines
1.7 KiB
C
/* df.c */
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#include <sys/statvfs.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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/* Prefs */
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typedef int Prefs;
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#define PREFS_k 1
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/* df */
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static int _df_error(char const * message, int ret);
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static int _df_mtab(Prefs * prefs);
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static int _df_do(Prefs * prefs, char const * file);
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static int _df(Prefs * prefs, int filec, char * filev[])
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{
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int ret = 0;
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int i;
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printf("%s%s%s", "Filesystem ", *prefs & PREFS_k ? "1024" : " 512",
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"-blocks Used Available Capacity Mounted on\n");
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if(filec == 0)
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return _df_mtab(prefs);
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for(i = 0; i < filec; i++)
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ret |= _df_do(prefs, filev[i]);
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return ret;
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}
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static int _df_error(char const * message, int ret)
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{
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fprintf(stderr, "%s", "df: ");
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perror(message);
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return ret;
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}
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static int _df_mtab(Prefs * prefs)
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{
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/* FIXME not portable code here:
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* - Linux: /etc/mtab
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* - NetBSD: getvfsstat() */
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return 0;
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}
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static int _df_do(Prefs * prefs, char const * file)
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{
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struct statvfs f;
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int mod;
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if(statvfs(file, &f) != 0)
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return _df_error(file, 1);
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mod = f.f_bsize / ((*prefs & PREFS_k) ? 1024 : 512);
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/* FIXME round up "Use%" result */
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printf("%11s %10lu %10lu %10lu %7lu%% %s\n", "", f.f_blocks * mod,
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(f.f_blocks-f.f_bfree) * mod, f.f_bavail * mod,
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((f.f_blocks-f.f_bfree)*100)/((f.f_blocks-f.f_bfree)
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+f.f_bavail), "");
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return 0;
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}
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/* usage */
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static int _usage(void)
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{
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fprintf(stderr, "%s", "Usage: df [-k][-P][file...]\n");
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return 1;
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}
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/* main */
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int main(int argc, char * argv[])
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{
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int o;
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Prefs prefs;
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memset(&prefs, sizeof(prefs), 0);
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while((o = getopt(argc, argv, "kP")) != -1)
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switch(o)
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{
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case 'k':
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prefs |= PREFS_k;
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break;
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case 'P':
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break;
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default:
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return _usage();
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}
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return _df(&prefs, argc - optind, &argv[optind]) == 0 ? 0 : 2;
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}
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