parsemode: rework
- for octal input: reset mode to 0. - take umask into account. - make '=rwx' etc work. - we wont support crazy but valid modes like "a+rw,g=x,o=g" - uudecode: use parsemode, mask is 0. Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>
This commit is contained in:
Hiltjo Posthuma
sin
parent
a1b62b2282
commit
bd99b92e91
22
chmod.c
22
chmod.c
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@ -9,8 +9,8 @@
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static void chmodr(const char *);
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static bool rflag = false;
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static int oper = '=';
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static mode_t mode = 0;
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static char *modestr = "";
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static mode_t mask = 0;
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static void
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usage(void)
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@ -45,7 +45,8 @@ main(int argc, char *argv[])
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}
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done:
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parsemode(argv[0], &mode, &oper);
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mask = getumask();
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modestr = argv[0];
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argv++;
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argc--;
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@ -61,22 +62,13 @@ void
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chmodr(const char *path)
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{
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struct stat st;
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mode_t m;
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if(stat(path, &st) == -1)
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eprintf("stat %s:", path);
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switch(oper) {
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case '+':
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st.st_mode |= mode;
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break;
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case '-':
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st.st_mode &= ~mode;
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break;
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case '=':
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st.st_mode = mode;
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break;
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}
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if(chmod(path, st.st_mode) == -1)
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m = parsemode(modestr, st.st_mode, mask);
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if(chmod(path, m) == -1)
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weprintf("chmod %s:", path);
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if(rflag)
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recurse(path, chmodr);
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3
util.h
3
util.h
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@ -27,4 +27,5 @@ size_t strlcat(char *, const char *, size_t);
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size_t strlcpy(char *, const char *, size_t);
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void weprintf(const char *, ...);
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void parsemode(const char *, mode_t *, int *);
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mode_t getumask(void);
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mode_t parsemode(const char *, mode_t, mode_t);
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92
util/mode.c
92
util/mode.c
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@ -4,74 +4,98 @@
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#include <sys/stat.h>
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#include "../util.h"
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void
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parsemode(const char *str, mode_t *mode, int *oper)
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mode_t
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getumask(void)
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{
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mode_t mask = umask(0);
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umask(mask);
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return mask;
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}
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mode_t
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parsemode(const char *str, mode_t mode, mode_t mask)
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{
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char *end;
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const char *p;
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int octal;
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mode_t mask = 0;
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int octal, op = '+';
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mode_t gmask = 0, m = 0;
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octal = strtol(str, &end, 8);
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if(*end == '\0') {
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if(octal < 0 || octal > 07777)
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if(octal < 0 || octal > 07777) {
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eprintf("%s: invalid mode\n", str);
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if(octal & 04000) *mode |= S_ISUID;
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if(octal & 02000) *mode |= S_ISGID;
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if(octal & 01000) *mode |= S_ISVTX;
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if(octal & 00400) *mode |= S_IRUSR;
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if(octal & 00200) *mode |= S_IWUSR;
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if(octal & 00100) *mode |= S_IXUSR;
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if(octal & 00040) *mode |= S_IRGRP;
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if(octal & 00020) *mode |= S_IWGRP;
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if(octal & 00010) *mode |= S_IXGRP;
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if(octal & 00004) *mode |= S_IROTH;
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if(octal & 00002) *mode |= S_IWOTH;
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if(octal & 00001) *mode |= S_IXOTH;
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return;
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return -1;
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}
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mode = 0;
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if(octal & 04000) mode |= S_ISUID;
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if(octal & 02000) mode |= S_ISGID;
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if(octal & 01000) mode |= S_ISVTX;
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if(octal & 00400) mode |= S_IRUSR;
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if(octal & 00200) mode |= S_IWUSR;
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if(octal & 00100) mode |= S_IXUSR;
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if(octal & 00040) mode |= S_IRGRP;
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if(octal & 00020) mode |= S_IWGRP;
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if(octal & 00010) mode |= S_IXGRP;
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if(octal & 00004) mode |= S_IROTH;
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if(octal & 00002) mode |= S_IWOTH;
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if(octal & 00001) mode |= S_IXOTH;
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return mode;
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}
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for(p = str; *p; p++)
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for(p = str; *p; p++) {
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switch(*p) {
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/* masks */
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case 'u':
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mask |= S_IRWXU;
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gmask |= S_IRWXU;
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break;
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case 'g':
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mask |= S_IRWXG;
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gmask |= S_IRWXG;
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break;
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case 'o':
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mask |= S_IRWXO;
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gmask |= S_IRWXO;
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break;
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case 'a':
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mask |= S_IRWXU|S_IRWXG|S_IRWXO;
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gmask |= S_IRWXU|S_IRWXG|S_IRWXO;
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break;
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/* opers */
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case '=':
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case '+':
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case '-':
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case '=':
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if(oper)
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*oper = (int)*p;
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op = (int)*p;
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break;
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/* modes */
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case 'r':
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*mode |= S_IRUSR|S_IRGRP|S_IROTH;
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m |= S_IRUSR|S_IRGRP|S_IROTH;
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break;
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case 'w':
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*mode |= S_IWUSR|S_IWGRP|S_IWOTH;
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m |= S_IWUSR|S_IWGRP|S_IWOTH;
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break;
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case 'x':
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*mode |= S_IXUSR|S_IXGRP|S_IXOTH;
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m |= S_IXUSR|S_IXGRP|S_IXOTH;
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break;
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case 's':
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*mode |= S_ISUID|S_ISGID;
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m |= S_ISUID|S_ISGID;
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break;
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case 't':
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*mode |= S_ISVTX;
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m |= S_ISVTX;
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break;
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/* error */
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default:
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eprintf("%s: invalid mode\n", str);
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return -1;
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}
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if(mask)
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*mode &= mask;
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/* apply */
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switch(op) {
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case '+':
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mode |= (m & ((~mask) & 0777));
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break;
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case '-':
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mode &= (~(m & ((~mask) & 0777)));
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break;
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case '=':
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mode = (m & ((~mask) & 0777));
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break;
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}
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}
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if(gmask && op != '=')
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mode &= ~gmask;
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return mode;
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}
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@ -107,7 +107,7 @@ parseheader(FILE *fp, const char *s, const char *header, mode_t *mode, char **fn
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eprintf("malformed mode string in header\n");
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*q++ = '\0';
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/* now mode should be null terminated, q points to fname */
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parsemode(p, mode, NULL);
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*mode = parsemode(p, *mode, 0);
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n = strlen(q);
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while (n > 0 && (q[n - 1] == '\n' || q[n - 1] == '\r'))
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q[--n] = '\0';
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