77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/* basename - print last part of a path Authors: B. Garfolo & P. Nelson */
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/* Basename - print the last part of a path.
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*
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* For MINIX -- Conforms to POSIX - P1003.2/D10
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* Exception -- it ignores the LC environment variables.
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*
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* Original MINIX author: Blaine Garfolo
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* POSIX rewrite author: Philip A. Nelson
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*
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* POSIX version - October 20, 1990
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* Feb 14, 1991: changed rindex to strrchr. (PAN)
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*
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#define EOS '\0'
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int main(int argc, char **argv);
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int main(argc, argv)
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int argc;
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char *argv[];
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{
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char *result_string; /* The pointer into argv[1]. */
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char *temp; /* Used to move around in argv[1]. */
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int suffix_len; /* Length of the suffix. */
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int suffix_start; /* Where the suffix should start. */
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/* Check for the correct number of arguments. */
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if ((argc < 2) || (argc > 3)) {
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fprintf(stderr, "Usage: basename string [suffix] \n");
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exit(1);
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}
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/* Check for all /'s */
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for (temp = argv[1]; *temp == '/'; temp++) /* Move to next char. */
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;
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if (*temp == EOS) {
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printf("/\n");
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exit(0);
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}
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/* Build the basename. */
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result_string = argv[1];
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/* Find the last /'s */
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temp = strrchr(result_string, '/');
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if (temp != NULL) {
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/* Remove trailing /'s. */
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while ((*(temp + 1) == EOS) && (*temp == '/')) *temp-- = EOS;
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/* Set result_string to last part of path. */
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if (*temp != '/') temp = strrchr(result_string, '/');
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if (temp != NULL && *temp == '/') result_string = temp + 1;
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}
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/* Remove the suffix, if any. */
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if (argc > 2) {
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suffix_len = strlen(argv[2]);
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suffix_start = strlen(result_string) - suffix_len;
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if (suffix_start > 0)
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if (strcmp(result_string + suffix_start, argv[2]) == EOS)
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*(result_string + suffix_start) = EOS;
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}
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/* Print the resultant string. */
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printf("%s\n", result_string);
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return(0);
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}
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