diff options
Diffstat (limited to 'ln.c')
| -rw-r--r-- | ln.c | 150 |
1 files changed, 76 insertions, 74 deletions
@@ -1,3 +1,4 @@ +/* vi: set sw=4 ts=4: */ /* * Mini ln implementation for busybox * @@ -30,15 +31,16 @@ #include <stdio.h> #include <dirent.h> #include <errno.h> -#include <sys/param.h> /* for PATH_MAX */ +#include <sys/param.h> /* for PATH_MAX */ static const char ln_usage[] = - "ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n\n" - "Create a link named LINK_NAME or DIRECTORY to the specified TARGET\n\n" - "Options:\n" - "\t-s\tmake symbolic links instead of hard links\n" - "\t-f\tremove existing destination files\n" - "\t-n\tno dereference symlinks - treat like normal file\n"; + "ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n\n" + "Create a link named LINK_NAME or DIRECTORY to the specified TARGET\n\n" + "Options:\n" + "\t-s\tmake symbolic links instead of hard links\n" + + "\t-f\tremove existing destination files\n" + "\t-n\tno dereference symlinks - treat like normal file\n"; static int symlinkFlag = FALSE; static int removeoldFlag = FALSE; @@ -46,83 +48,83 @@ static int followLinks = TRUE; extern int ln_main(int argc, char **argv) { - char *linkName; - int linkIntoDirFlag; - - if (argc < 3) { - usage (ln_usage); - } - argc--; - argv++; - - /* Parse any options */ - while (**argv == '-') { - while (*++(*argv)) - switch (**argv) { - case 's': - symlinkFlag = TRUE; - break; - case 'f': - removeoldFlag = TRUE; - break; - case 'n': - followLinks = FALSE; - break; - default: - usage (ln_usage); - } + char *linkName; + int linkIntoDirFlag; + + if (argc < 3) { + usage(ln_usage); + } argc--; argv++; - } - - linkName = argv[argc - 1]; - - if (strlen(linkName) > PATH_MAX) { - fprintf(stderr, name_too_long, "ln"); - exit FALSE; - } - linkIntoDirFlag = isDirectory(linkName, TRUE); - - if ((argc > 3) && !linkIntoDirFlag) { - fprintf(stderr, not_a_directory, "ln", linkName); - exit FALSE; - } + /* Parse any options */ + while (**argv == '-') { + while (*++(*argv)) + switch (**argv) { + case 's': + symlinkFlag = TRUE; + break; + case 'f': + removeoldFlag = TRUE; + break; + case 'n': + followLinks = FALSE; + break; + default: + usage(ln_usage); + } + argc--; + argv++; + } - while (argc-- >= 2) { - char srcName[PATH_MAX + 1]; - int nChars, status; + linkName = argv[argc - 1]; - if (strlen(*argv) > PATH_MAX) { - fprintf(stderr, name_too_long, "ln"); - exit FALSE; + if (strlen(linkName) > PATH_MAX) { + fprintf(stderr, name_too_long, "ln"); + exit FALSE; } - if (followLinks == FALSE) { - strcpy(srcName, *argv); - } else { - /* Warning! This can silently truncate if > PATH_MAX, but - I don't think that there can be one > PATH_MAX anyway. */ - nChars = readlink(*argv, srcName, PATH_MAX); - srcName[nChars] = '\0'; - } + linkIntoDirFlag = isDirectory(linkName, TRUE); - if (removeoldFlag == TRUE) { - status = ( unlink(linkName) && errno != ENOENT ); - if (status != 0) { - perror(linkName); + if ((argc > 3) && !linkIntoDirFlag) { + fprintf(stderr, not_a_directory, "ln", linkName); exit FALSE; - } } - if (symlinkFlag == TRUE) - status = symlink(*argv, linkName); - else - status = link(*argv, linkName); - if (status != 0) { - perror(linkName); - exit FALSE; + while (argc-- >= 2) { + char srcName[PATH_MAX + 1]; + int nChars, status; + + if (strlen(*argv) > PATH_MAX) { + fprintf(stderr, name_too_long, "ln"); + exit FALSE; + } + + if (followLinks == FALSE) { + strcpy(srcName, *argv); + } else { + /* Warning! This can silently truncate if > PATH_MAX, but + I don't think that there can be one > PATH_MAX anyway. */ + nChars = readlink(*argv, srcName, PATH_MAX); + srcName[nChars] = '\0'; + } + + if (removeoldFlag == TRUE) { + status = (unlink(linkName) && errno != ENOENT); + if (status != 0) { + perror(linkName); + exit FALSE; + } + } + + if (symlinkFlag == TRUE) + status = symlink(*argv, linkName); + else + status = link(*argv, linkName); + if (status != 0) { + perror(linkName); + exit FALSE; + } } - } - exit TRUE; + exit TRUE; } |