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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [fs/] [hfsplus/] [options.c] - Rev 1765
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/* * linux/fs/hfsplus/options.c * * Copyright (C) 2001 * Brad Boyer (flar@allandria.com) * (C) 2003 Ardis Technologies <roman@ardistech.com> * * Option parsing */ #include <linux/string.h> #include <linux/kernel.h> #include <linux/sched.h> #include "hfsplus_fs.h" /* Initialize an options object to reasonable defaults */ void fill_defaults(struct hfsplus_sb_info *opts) { if (!opts) return; opts->creator = HFSPLUS_DEF_CR_TYPE; opts->type = HFSPLUS_DEF_CR_TYPE; opts->charcase = HFSPLUS_CASE_ASIS; opts->fork = HFSPLUS_FORK_RAW; opts->namemap = HFSPLUS_NAMES_TRIVIAL; opts->umask = current->fs->umask; opts->uid = current->uid; opts->gid = current->gid; } #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) /* Copy settings from one hfsplus_sb_info object to another */ void fill_current(struct hfsplus_sb_info *curopts, struct hfsplus_sb_info *opts) { if (!curopts || !opts) return; opts->creator = curopts->creator; opts->type = curopts->type; opts->charcase = curopts->charcase; opts->fork = curopts->fork; opts->namemap = curopts->namemap; opts->umask = curopts->umask; opts->uid = curopts->uid; opts->gid = curopts->gid; } #endif /* convert a "four byte character" to a 32 bit int with error checks */ static int fill_fourchar(u32 *result, char *input) { u32 out; int i; if (!result || !input || !*input || (strlen(input) != 4)) return 0; for (out = 0, i = 0; i < 4; i++) { out <<= 8; out |= ((int)(input[i])) & 0xFF; } *result = out; return 1; } /* convert a string to int with error checks */ static int fill_int(int *result, char *input, int base) { char *tmp = input; int intval; if (!result || !input || !*input) return 0; intval = simple_strtoul(tmp, &tmp, base); if (*tmp) return 0; *result = intval; return 1; } /* Parse options from mount. Returns 0 on failure */ /* input is the options passed to mount() as a string */ int parse_options(char *input, struct hfsplus_sb_info *results) { char *curropt, *value; int tmp; if (!input) return 1; while ((curropt = strsep(&input,",")) != NULL) { if (!*curropt) continue; if ((value = strchr(curropt, '=')) != NULL) *value++ = '\0'; if (!strcmp(curropt, "creator")) { if (!fill_fourchar(&(results->creator), value)) { printk("HFS+-fs: creator requires a 4 character value\n"); return 0; } } else if (!strcmp(curropt, "type")) { if (!fill_fourchar(&(results->type), value)) { printk("HFS+-fs: type requires a 4 character value\n"); return 0; } } else if (!strcmp(curropt, "case")) { } else if (!strcmp(curropt, "fork")) { } else if (!strcmp(curropt, "names")) { } else if (!strcmp(curropt, "umask")) { if (!fill_int(&tmp, value, 8)) { printk("HFS+-fs: umask requires a value\n"); return 0; } results->umask = (umode_t)tmp; } else if (!strcmp(curropt, "uid")) { if (!fill_int(&tmp, value, 0)) { printk("HFS+-fs: uid requires an argument\n"); return 0; } results->uid = (uid_t)tmp; } else if (!strcmp(curropt, "gid")) { if (!fill_int(&tmp, value, 0)) { printk("HFS+-fs: gid requires an argument\n"); return 0; } results->gid = (gid_t)tmp; } else { printk("HFS+-fs: unknown option %s\n", curropt); return 0; } } return 1; }