1 /* opkg_utils.c - the opkg package management system 2 3 Steven M. Ayer 4 5 Copyright (C) 2002 Compaq Computer Corporation 6 7 This program is free software; you can redistribute it and/or 8 modify it under the terms of the GNU General Public License as 9 published by the Free Software Foundation; either version 2, or (at 10 your option) any later version. 11 12 This program is distributed in the hope that it will be useful, but 13 WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 General Public License for more details. 16 */ 17 18 #include <ctype.h> 19 #include <sys/statvfs.h> 20 21 #include "libbb/libbb.h" 22 #include "opkg_utils.h" 23 24 unsigned long get_available_kbytes(char *filesystem) 25 { 26 struct statvfs f; 27 28 if (statvfs(filesystem, &f) == -1) { 29 opkg_perror(ERROR, "Failed to statvfs for %s", filesystem); 30 return 0; 31 } 32 // Actually ((sfs.f_bavail * sfs.f_frsize) / 1024) 33 // and here we try to avoid overflow. 34 if (f.f_frsize >= 1024) 35 return (f.f_bavail * (f.f_frsize / 1024)); 36 else if (f.f_frsize > 0) 37 return f.f_bavail / (1024 / f.f_frsize); 38 39 opkg_msg(ERROR, "Unknown block size for target filesystem.\n"); 40 41 return 0; 42 } 43 44 /* something to remove whitespace, a hash pooper */ 45 char *trim_xstrdup(const char *src) 46 { 47 const char *end; 48 49 /* remove it from the front */ 50 while (src && isspace(*src) && *src) 51 src++; 52 53 end = src + (strlen(src) - 1); 54 55 /* and now from the back */ 56 while ((end > src) && isspace(*end)) 57 end--; 58 59 end++; 60 61 /* xstrndup will NULL terminate for us */ 62 return xstrndup(src, end - src); 63 } 64 65 int line_is_blank(const char *line) 66 { 67 const char *s; 68 69 for (s = line; *s; s++) { 70 if (!isspace(*s)) 71 return 0; 72 } 73 return 1; 74 } 75
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