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author | Felix Fietkau <nbd@openwrt.org> | 2005-07-24 19:58:14 +0000 |
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committer | Felix Fietkau <nbd@openwrt.org> | 2005-07-24 19:58:14 +0000 |
commit | 8304dfdacebbabb05cf8301c66c4002c543e8888 (patch) | |
tree | 056c21ee081ea7e79141723c2b6a0d083c49a348 /package/nvram/src/shutils.c | |
parent | f91aad926f9e0d34d806454a99f25bac63500b12 (diff) | |
download | upstream-8304dfdacebbabb05cf8301c66c4002c543e8888.tar.gz upstream-8304dfdacebbabb05cf8301c66c4002c543e8888.tar.bz2 upstream-8304dfdacebbabb05cf8301c66c4002c543e8888.zip |
move wificonf and nvram stuff back to package/, remove build_mipsel/root, run install part of package/ for every board/kernel - fixes dependency mess
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@1540 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/nvram/src/shutils.c')
-rw-r--r-- | package/nvram/src/shutils.c | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/package/nvram/src/shutils.c b/package/nvram/src/shutils.c new file mode 100644 index 0000000000..49ad41af81 --- /dev/null +++ b/package/nvram/src/shutils.c @@ -0,0 +1,329 @@ +/* + * Shell-like utility functions + * + * Copyright 2004, Broadcom Corporation + * All Rights Reserved. + * + * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY + * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM + * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. + * + * $Id$ + */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <errno.h> +#include <error.h> +#include <fcntl.h> +#include <limits.h> +#include <unistd.h> +#include <signal.h> +#include <string.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/wait.h> +#include <termios.h> +#include <sys/ioctl.h> +#include <sys/time.h> +#include <net/ethernet.h> + +#include <shutils.h> + +/* + * Reads file and returns contents + * @param fd file descriptor + * @return contents of file or NULL if an error occurred + */ +char * +fd2str(int fd) +{ + char *buf = NULL; + size_t count = 0, n; + + do { + buf = realloc(buf, count + 512); + n = read(fd, buf + count, 512); + if (n < 0) { + free(buf); + buf = NULL; + } + count += n; + } while (n == 512); + + close(fd); + if (buf) + buf[count] = '\0'; + return buf; +} + +/* + * Reads file and returns contents + * @param path path to file + * @return contents of file or NULL if an error occurred + */ +char * +file2str(const char *path) +{ + int fd; + + if ((fd = open(path, O_RDONLY)) == -1) { + perror(path); + return NULL; + } + + return fd2str(fd); +} + +/* + * Waits for a file descriptor to change status or unblocked signal + * @param fd file descriptor + * @param timeout seconds to wait before timing out or 0 for no timeout + * @return 1 if descriptor changed status or 0 if timed out or -1 on error + */ +int +waitfor(int fd, int timeout) +{ + fd_set rfds; + struct timeval tv = { timeout, 0 }; + + FD_ZERO(&rfds); + FD_SET(fd, &rfds); + return select(fd + 1, &rfds, NULL, NULL, (timeout > 0) ? &tv : NULL); +} + +/* + * Concatenates NULL-terminated list of arguments into a single + * commmand and executes it + * @param argv argument list + * @param path NULL, ">output", or ">>output" + * @param timeout seconds to wait before timing out or 0 for no timeout + * @param ppid NULL to wait for child termination or pointer to pid + * @return return value of executed command or errno + */ +int +_eval(char *const argv[], char *path, int timeout, int *ppid) +{ + pid_t pid; + int status; + int fd; + int flags; + int sig; + char buf[254]=""; + int i; + + switch (pid = fork()) { + case -1: /* error */ + perror("fork"); + return errno; + case 0: /* child */ + /* Reset signal handlers set for parent process */ + for (sig = 0; sig < (_NSIG-1); sig++) + signal(sig, SIG_DFL); + + /* Clean up */ + ioctl(0, TIOCNOTTY, 0); + close(STDIN_FILENO); + close(STDOUT_FILENO); + close(STDERR_FILENO); + setsid(); + + /* We want to check the board if exist UART? , add by honor 2003-12-04 */ + if ((fd = open("/dev/console", O_RDWR)) < 0) { + (void) open("/dev/null", O_RDONLY); + (void) open("/dev/null", O_WRONLY); + (void) open("/dev/null", O_WRONLY); + } + else{ + close(fd); + (void) open("/dev/console", O_RDONLY); + (void) open("/dev/console", O_WRONLY); + (void) open("/dev/console", O_WRONLY); + } + + /* Redirect stdout to <path> */ + if (path) { + flags = O_WRONLY | O_CREAT; + if (!strncmp(path, ">>", 2)) { + /* append to <path> */ + flags |= O_APPEND; + path += 2; + } else if (!strncmp(path, ">", 1)) { + /* overwrite <path> */ + flags |= O_TRUNC; + path += 1; + } + if ((fd = open(path, flags, 0644)) < 0) + perror(path); + else { + dup2(fd, STDOUT_FILENO); + close(fd); + } + } + + /* execute command */ + for(i=0 ; argv[i] ; i++) + snprintf(buf+strlen(buf), sizeof(buf), "%s ", argv[i]); + dprintf("cmd=[%s]\n", buf); + setenv("PATH", "/sbin:/bin:/usr/sbin:/usr/bin", 1); + alarm(timeout); + execvp(argv[0], argv); + perror(argv[0]); + exit(errno); + default: /* parent */ + if (ppid) { + *ppid = pid; + return 0; + } else { + waitpid(pid, &status, 0); + if (WIFEXITED(status)) + return WEXITSTATUS(status); + else + return status; + } + } +} + +/* + * Concatenates NULL-terminated list of arguments into a single + * commmand and executes it + * @param argv argument list + * @return stdout of executed command or NULL if an error occurred + */ +char * +_backtick(char *const argv[]) +{ + int filedes[2]; + pid_t pid; + int status; + char *buf = NULL; + + /* create pipe */ + if (pipe(filedes) == -1) { + perror(argv[0]); + return NULL; + } + + switch (pid = fork()) { + case -1: /* error */ + return NULL; + case 0: /* child */ + close(filedes[0]); /* close read end of pipe */ + dup2(filedes[1], 1); /* redirect stdout to write end of pipe */ + close(filedes[1]); /* close write end of pipe */ + execvp(argv[0], argv); + exit(errno); + break; + default: /* parent */ + close(filedes[1]); /* close write end of pipe */ + buf = fd2str(filedes[0]); + waitpid(pid, &status, 0); + break; + } + + return buf; +} + +/* + * Kills process whose PID is stored in plaintext in pidfile + * @param pidfile PID file + * @return 0 on success and errno on failure + */ +int +kill_pidfile(char *pidfile) +{ + FILE *fp = fopen(pidfile, "r"); + char buf[256]; + + if (fp && fgets(buf, sizeof(buf), fp)) { + pid_t pid = strtoul(buf, NULL, 0); + fclose(fp); + return kill(pid, SIGTERM); + } else + return errno; +} + +/* + * fread() with automatic retry on syscall interrupt + * @param ptr location to store to + * @param size size of each element of data + * @param nmemb number of elements + * @param stream file stream + * @return number of items successfully read + */ +int +safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream) +{ + size_t ret = 0; + + do { + clearerr(stream); + ret += fread((char *)ptr + (ret * size), size, nmemb - ret, stream); + } while (ret < nmemb && ferror(stream) && errno == EINTR); + + return ret; +} + +/* + * fwrite() with automatic retry on syscall interrupt + * @param ptr location to read from + * @param size size of each element of data + * @param nmemb number of elements + * @param stream file stream + * @return number of items successfully written + */ +int +safe_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream) +{ + size_t ret = 0; + + do { + clearerr(stream); + ret += fwrite((char *)ptr + (ret * size), size, nmemb - ret, stream); + } while (ret < nmemb && ferror(stream) && errno == EINTR); + + return ret; +} + +/* + * Convert Ethernet address string representation to binary data + * @param a string in xx:xx:xx:xx:xx:xx notation + * @param e binary data + * @return TRUE if conversion was successful and FALSE otherwise + */ +int +ether_atoe(const char *a, unsigned char *e) +{ + char *c = (char *) a; + int i = 0; + + memset(e, 0, ETHER_ADDR_LEN); + for (;;) { + e[i++] = (unsigned char) strtoul(c, &c, 16); + if (!*c++ || i == ETHER_ADDR_LEN) + break; + } + return (i == ETHER_ADDR_LEN); +} + +/* + * Convert Ethernet address binary data to string representation + * @param e binary data + * @param a string in xx:xx:xx:xx:xx:xx notation + * @return a + */ +char * +ether_etoa(const unsigned char *e, char *a) +{ + char *c = a; + int i; + + for (i = 0; i < ETHER_ADDR_LEN; i++) { + if (i) + *c++ = ':'; + c += sprintf(c, "%02X", e[i] & 0xff); + } + return a; +} |