133 lines
1.9 KiB
C
133 lines
1.9 KiB
C
#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <limits.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "imapfilter.h"
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#include "pathnames.h"
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extern environment env;
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/*
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* Create imapfilter's home directory.
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*/
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int
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create_homedir(void)
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{
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int n;
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char b;
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char *hd;
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n = snprintf(&b, 1, "%s/%s", env.home, PATHNAME_HOME);
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if (env.pathmax != -1 && n > env.pathmax)
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fatal(ERROR_PATHNAME,
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"pathname limit %ld exceeded: %d\n", env.pathmax, n);
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hd = (char *)xmalloc((n + 1) * sizeof(char));
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snprintf(hd, n + 1, "%s/%s", env.home, PATHNAME_HOME);
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if (!exists_dir(hd)) {
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if (mkdir(hd, S_IRUSR | S_IWUSR | S_IXUSR))
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error("could not create directory %s; %s\n", hd,
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strerror(errno));
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}
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xfree(hd);
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return 0;
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}
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/*
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* Check if a file exists.
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*/
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int
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exists_file(char *fname)
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{
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struct stat fs;
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if (access(fname, F_OK))
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return 0;
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stat(fname, &fs);
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if (!S_ISREG(fs.st_mode)) {
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error("file %s not a regular file\n", fname);
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return -1;
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}
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return 1;
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}
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/*
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* Check if a directory exists.
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*/
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int
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exists_dir(char *dname)
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{
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struct stat ds;
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if (access(dname, F_OK))
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return 0;
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stat(dname, &ds);
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if (!S_ISDIR(ds.st_mode)) {
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error("file %s not a directory\n", dname);
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return -1;
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}
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return 1;
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}
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/*
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* Create a file with the specified permissions.
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*/
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int
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create_file(char *fname, mode_t mode)
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{
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int fd;
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fd = 0;
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if (!exists_file(fname)) {
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fd = open(fname, O_CREAT | O_WRONLY | O_TRUNC, mode);
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if (fd == -1) {
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error("could not create file %s; %s\n", fname,
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strerror(errno));
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return -1;
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}
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close(fd);
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}
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return 0;
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}
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/*
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* Get the system's maximum number of bytes in a pathname.
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*/
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int
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get_pathmax(void)
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{
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int n;
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errno = 0;
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n = pathconf("/", _PC_PATH_MAX);
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if (n == -1 && errno != 0) {
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error("getting PATH_MAX limit; %s\n", strerror(errno));
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return -1;
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}
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env.pathmax = n;
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return 0;
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}
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