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- /*===========================================================================
- Copyright (c) 1998-2000, The Santa Cruz Operation
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
-
- *Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- *Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
-
- *Neither name of The Santa Cruz Operation nor the names of its contributors
- may be used to endorse or promote products derived from this software
- without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
- IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT falseT LIMITED TO,
- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT falseT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- INTERRUPTION)
- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- DAMAGE.
- =========================================================================*/
-
- /*
- * logdir()
- *
- * This routine does not use the getpwent(3) library routine
- * because the latter uses the stdio package. The allocation of
- * storage in this package destroys the integrity of the shell's
- * storage allocation.
- */
-
- #include <unistd.h>
- #include <string.h>
- #include "global.h"
-
- #define OURBUFSIZ 160 /* renamed: avoid conflict with <stdio.h> */
-
- static char line[OURBUFSIZ + 1];
-
- /* Internal prototypes: */
- static char *nextfield(char *p);
-
- static char *nextfield(char *p) {
- while(*p && *p != ':')
- ++p;
- if(*p) *p++ = 0;
- return (p);
- }
-
- char *logdir(char *name) {
- char *p;
- int i, j;
- int pwf;
-
- /* attempt to open the password file */
- if((pwf = myopen("/etc/passwd", 0, 0)) == -1) return (0);
-
- /* find the matching password entry */
- do {
- /* get the next line in the password file */
- i = read(pwf, line, OURBUFSIZ);
- for(j = 0; j < i; j++)
- if(line[j] == '\n') break;
- /* return a null pointer if the whole file has been read */
- if(j >= i) return (0);
- line[++j] = 0; /* terminate the line */
- (void)lseek(pwf, (long)(j - i), 1); /* point at the next line */
- p = nextfield(line); /* get the logname */
- } while(*name != *line || /* fast pretest */
- strcmp(name, line) != 0);
- (void)close(pwf);
-
- /* skip the intervening fields */
- p = nextfield(p);
- p = nextfield(p);
- p = nextfield(p);
- p = nextfield(p);
-
- /* return the login directory */
- (void)nextfield(p);
- return (p);
- }
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