masqmail

annotate src/peopen.c @ 75:257a9e6d1a8e

find changesets by author, revision, files, or words in the commit message
fixed correct processing of mails with data lines longer 4096 chars Mail messages with lines longer than 4096 chars were already read correctly, i.e. the spool files were correct. This commit fixes the reading of spool files with long lines. The old behavior was that the message body was truncated right before the first line longer 4096 chars. The number comes from MAX_DATALINE.
author meillo@marmaro.de
date Wed, 16 Jun 2010 19:06:34 +0200
parents 3654c502a4df
children dcb315792513
rev   line source
meillo@0 1 /* This a snippet I found in sourceforge. I just changed the identing
meillo@29 2 style to my own and deleted the main function. -- oku
meillo@29 3 The functions destroy_argv() and create_argv() were added by oku.
meillo@29 4 */
meillo@0 5
meillo@0 6 #include <errno.h>
meillo@0 7 #include <stdio.h>
meillo@0 8 #include <stdlib.h>
meillo@0 9 #include <unistd.h>
meillo@0 10 #include <string.h>
meillo@0 11 #include <sys/types.h>
meillo@15 12 #include <sysexits.h>
meillo@0 13
meillo@0 14 #include "peopen.h"
meillo@0 15 #include "masqmail.h"
meillo@0 16
meillo@10 17 static void
meillo@10 18 destroy_argv(char **arr)
meillo@0 19 {
meillo@10 20 char *p = arr[0];
meillo@10 21 int i = 0;
meillo@0 22
meillo@10 23 while (p) {
meillo@10 24 free(p);
meillo@10 25 p = arr[i++];
meillo@10 26 }
meillo@10 27 free(arr);
meillo@0 28 }
meillo@0 29
meillo@10 30 static char**
meillo@10 31 create_argv(const char *cmd, int count)
meillo@0 32 {
meillo@10 33 char buf[strlen(cmd) + 1];
meillo@10 34 char **arr, *q;
meillo@10 35 const char *p;
meillo@10 36 int i = 0;
meillo@0 37
meillo@27 38 arr = (char **) g_malloc(sizeof(char *) * count);
meillo@0 39
meillo@10 40 p = cmd;
meillo@10 41 while (*p && i < (count - 1)) {
meillo@10 42 while (*p && isspace(*p))
meillo@10 43 p++;
meillo@10 44 q = buf;
meillo@10 45 while (*p && !isspace(*p))
meillo@10 46 *q++ = *p++;
meillo@15 47 *q = '\0';
meillo@10 48 arr[i++] = strdup(buf);
meillo@10 49 while (*p && isspace(*p))
meillo@10 50 p++;
meillo@10 51 }
meillo@10 52 arr[i] = NULL;
meillo@10 53
meillo@10 54 return arr;
meillo@0 55 }
meillo@0 56
meillo@10 57 FILE*
meillo@10 58 peidopen(const char *command, const char *type, char *const envp[], int *ret_pid, uid_t uid, gid_t gid)
meillo@0 59 {
meillo@10 60 enum { Read, Write } mode;
meillo@10 61 int pipe_fd[2];
meillo@10 62 pid_t pid;
meillo@0 63
meillo@10 64 if (command == NULL || type == NULL) {
meillo@10 65 errno = EINVAL;
meillo@10 66 return NULL;
meillo@10 67 }
meillo@0 68
meillo@10 69 if (strcmp(type, "r")) {
meillo@10 70 if (strcmp(type, "w")) {
meillo@10 71 errno = EINVAL;
meillo@10 72 return NULL;
meillo@10 73 } else
meillo@10 74 mode = Write;
meillo@10 75 } else
meillo@10 76 mode = Read;
meillo@0 77
meillo@10 78 if (pipe(pipe_fd) == -1)
meillo@10 79 return NULL;
meillo@0 80
meillo@10 81 switch (pid = fork()) {
meillo@10 82 case 0: /* child thread */
meillo@0 83
meillo@10 84 {
meillo@10 85 int i, max_fd = sysconf(_SC_OPEN_MAX);
meillo@10 86
meillo@10 87 if (max_fd <= 0)
meillo@10 88 max_fd = 64;
meillo@10 89 for (i = 0; i < max_fd; i++)
meillo@10 90 if ((i != pipe_fd[0]) && (i != pipe_fd[1]))
meillo@10 91 close(i);
meillo@10 92 }
meillo@10 93 if (close(pipe_fd[mode == Read ? 0 : 1]) != -1 &&
meillo@10 94 dup2(pipe_fd[mode == Read ? 1 : 0],
meillo@10 95 mode == Read ? STDOUT_FILENO : STDIN_FILENO) != -1) {
meillo@10 96 // char *argv [] = { "/bin/sh", "-c", (char*) command, NULL };
meillo@10 97 char **argv = create_argv(command, 10);
meillo@10 98 int ret;
meillo@10 99
meillo@10 100 if (uid != (uid_t) - 1) {
meillo@10 101 if ((ret = seteuid(0)) != 0) {
meillo@10 102 exit(EX_NOPERM);
meillo@10 103 }
meillo@10 104 }
meillo@10 105 if (gid != (gid_t) - 1) {
meillo@10 106 if ((ret = setgid(gid)) != 0) {
meillo@10 107 exit(EX_NOPERM);
meillo@10 108 }
meillo@10 109 }
meillo@10 110 if (uid != (uid_t) - 1) {
meillo@10 111 if ((ret = setuid(uid)) != 0) {
meillo@10 112 exit(EX_NOPERM);
meillo@10 113 }
meillo@10 114 }
meillo@10 115 execve(*argv, argv, envp);
meillo@10 116 }
meillo@10 117
meillo@10 118 _exit(errno);
meillo@10 119
meillo@10 120 default: /* parent thread */
meillo@10 121 *ret_pid = pid;
meillo@10 122 close(pipe_fd[mode == Read ? 1 : 0]);
meillo@10 123 return fdopen(pipe_fd[mode == Read ? 0 : 1], type);
meillo@10 124
meillo@10 125 case -1:
meillo@10 126 close(pipe_fd[0]);
meillo@10 127 close(pipe_fd[1]);
meillo@10 128 return NULL;
meillo@0 129 }
meillo@0 130 }
meillo@0 131
meillo@10 132 FILE*
meillo@10 133 peopen(const char *command, const char *type, char *const envp[], int *ret_pid)
meillo@0 134 {
meillo@10 135 return peidopen(command, type, envp, ret_pid, -1, -1);
meillo@0 136 }