e8420087b0
In some cases replace if (a == null) a = malloc(x); else a = realloc(a, x); with simple reallocf(a, x). Per ANSI-C, this is guaranteed to be the same thing. I've been running these on my system here w/o ill effects for some time. However, the CTM-express is at part 6 of 34 for the CAM changes, so I've not been able to do a build world with the CAM in the tree with these changes. Shouldn't impact anything, but...
149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
/*
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* Copyright 1987, 1988 by MIT Student Information Processing Board
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*
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* For copyright info, see copyright.h.
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*/
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#include <sys/param.h>
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#include <sys/file.h>
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#include <sys/wait.h>
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#include <dirent.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "ss_internal.h"
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#include "copyright.h"
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extern int errno;
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void ss_help (argc, argv, sci_idx, info_ptr)
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int argc;
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char const * const *argv;
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int sci_idx;
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pointer info_ptr;
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{
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char buffer[MAXPATHLEN];
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char const *request_name;
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int code;
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int fd, child;
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register int idx;
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register ss_data *info;
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request_name = ss_current_request(sci_idx, &code);
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if (code != 0) {
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ss_perror(sci_idx, code, "");
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return; /* no ss_abort_line, if invalid invocation */
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}
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if (argc == 1) {
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ss_list_requests(argc, argv, sci_idx, info_ptr);
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return;
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}
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else if (argc != 2) {
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/* should do something better than this */
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sprintf(buffer, "usage:\n\t%s [topic|command]\nor\t%s\n",
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request_name, request_name);
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ss_perror(sci_idx, 0, buffer);
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return;
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}
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info = ss_info(sci_idx);
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if (info->info_dirs == (char **)NULL) {
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ss_perror(sci_idx, SS_ET_NO_INFO_DIR, (char *)NULL);
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return;
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}
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if (info->info_dirs[0] == (char *)NULL) {
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ss_perror(sci_idx, SS_ET_NO_INFO_DIR, (char *)NULL);
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return;
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}
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for (idx = 0; info->info_dirs[idx] != (char *)NULL; idx++) {
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(void) strcpy(buffer, info->info_dirs[idx]);
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(void) strcat(buffer, "/");
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(void) strcat(buffer, argv[1]);
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(void) strcat(buffer, ".info");
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if ((fd = open(&buffer[0], O_RDONLY, 0)) >= 0) goto got_it;
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}
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if ((fd = open(&buffer[0], O_RDONLY, 0)) < 0) {
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char buf[MAXPATHLEN];
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strcpy(buf, "No info found for ");
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strcat(buf, argv[1]);
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ss_perror(sci_idx, 0, buf);
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return;
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}
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got_it:
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switch (child = fork()) {
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case -1:
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ss_perror(sci_idx, errno, "Can't fork for pager");
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return;
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case 0:
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(void) dup2(fd, 0); /* put file on stdin */
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ss_page_stdin();
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default:
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(void) close(fd); /* what can we do if it fails? */
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#ifndef POSIX
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while (wait((union wait *)NULL) != child)
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#else
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while (wait((int *)NULL) != child)
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#endif
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{
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/* do nothing if wrong pid */
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};
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}
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}
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void ss_add_info_dir(sci_idx, info_dir, code_ptr)
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int sci_idx;
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char *info_dir;
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int *code_ptr;
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{
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register ss_data *info;
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DIR *d;
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int n_dirs;
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register char **dirs;
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info = ss_info(sci_idx);
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if (info_dir == NULL && *info_dir) {
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*code_ptr = SS_ET_NO_INFO_DIR;
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return;
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}
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if ((d = opendir(info_dir)) == (DIR *)NULL) {
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*code_ptr = errno;
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return;
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}
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closedir(d);
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dirs = info->info_dirs;
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for (n_dirs = 0; dirs[n_dirs] != (char *)NULL; n_dirs++)
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; /* get number of non-NULL dir entries */
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dirs = (char **)reallocf((char *)dirs,
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(unsigned)(n_dirs + 2)*sizeof(char *));
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if (dirs == (char **)NULL) {
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info->info_dirs = (char **)NULL;
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*code_ptr = errno;
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return;
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}
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info->info_dirs = dirs;
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dirs[n_dirs + 1] = (char *)NULL;
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dirs[n_dirs] = malloc((unsigned)strlen(info_dir)+1);
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strcpy(dirs[n_dirs], info_dir);
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*code_ptr = 0;
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}
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void ss_delete_info_dir(sci_idx, info_dir, code_ptr)
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int sci_idx;
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char *info_dir;
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int *code_ptr;
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{
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register char **i_d;
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register char **info_dirs;
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info_dirs = ss_info(sci_idx)->info_dirs;
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for (i_d = info_dirs; *i_d; i_d++) {
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if (!strcmp(*i_d, info_dir)) {
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while (*i_d) {
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*i_d = *(i_d+1);
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i_d++;
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}
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*code_ptr = 0;
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return;
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}
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}
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*code_ptr = SS_ET_NO_INFO_DIR;
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}
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